Unlock the following pistols by completing the corresponding levels:

PISTOL - LEVEL
.357 Magnum - Reach level 49.
Colt M1911 - Reach level 4.
Nambu - Reach level 4.
Tokrev TT-33 - Reach level 21.
Walther P38 - Reach level 4.

Reach the following levels to unlock the corresponding multiplayer rewards:

LEVEL - REWARD
Reach level 2 - Get trench gun(shotgun), walther.
Reach level 3 - Get 1911 colt, springfield(sniper).
Reach level 4 - Get arisaka, BAR.
Reach level 6 - Get gewehr 47.
Reach level 10 - Get molotov cocktail, MP40.
Reach level 11 - Get clan tag.
Reach level 13 - Get DP-28.
Reach level 17 - Get M1 garand.
Reach level 21 - Get mosin-nagant.
Reach level 25 - Get type 100.
Reach level 29 - Get double-barreled shotgun.
Reach level 33 - Get MG42.
Reach level 37 - Get STG-44.
Reach level 41 - Get Kar98k.
Reach level 45 - Get FG42.
Reach level 49 - Get .357 magnum.
Reach level 53 - Get PPSh-41.
Reach level 57 - Get PTRS-41.
Reach level 61 - Get browning M1919.
Reach level 65 - Get M1A1 carbine.
Reach prestige level 1 - Get custom class slot 6.
Reach prestige level 2 - Get custom class slot 7.
Reach prestige level 4 - Get custom class slot 8.
Reach prestige level 7 - Get custom class slot 9.
Reach prestige level 10 - Get custom class slot 10.

Note: Two controllers are required. Turn on controller two and use controller one to create a new profile named "JD 2020" (case-sensitive). Start your Call Of Duty: World At War game and go to multiplayer mode. Then, press A on both controllers and select "Continue". Start the game but do not select teams. Instead, press Xbox Logo on controller two and sign out. Then do the same with controller one. Sign back into your Xbox Live profile and go to Xbox Live. Then go to the barracks and then to "Clan Tag". Finally, activate the following animations by entering the corresponding word as your clan tags:

ANIMATION - WORD
Rainbow scrolls through your name - Enter rain as a Clan Tag.
A "o" bounces through the periods in your Clan Tag - Enter .... as a Clan Tag.
A "Plus" symbol bounces through your Clan Tag - Enter **** as a Clan Tag.
Name bounces from left to right - Enter move as a Clan Tag.
Colors will scroll left to right in your name - Enter cycl as a Clan Tag.
Gold tag - Enter gold as a Clan Tag.
Red stripe moves back and forth through your name - Enter cyln as a Clan Tag.

Unlock the following extra custom weapon slots by reaching the corresponding prestige ranks:

SLOTS - RANK
6 - First prestige.
7 - Second prestige.
8 - Fourth prestige
9 - Seventh prestige.
10 - Tenth prestige.

-You can hear a disembodied voice near the bathroom. It comes from just outside of the bathroom and is best heard while in Spectator mode.

-Just outside of the bathroom on Asylum, exactly where the disembodied voice is heard, a crying girl can also be heard. She will switch back and forth from crying to laughing,which is quite disturbing.

-All around the stairs that are a distance from where the piano can be heard, you can here the sound of knocking on the wood that is covering up all the windows. If you fly around constantly as a spectator you can hear this wooden knocking sound everywhere. It distinctly sounds like someone deliberately knocking on wood and can also be heard on the boarded up windows on the other side of the map.

Above the bathroom in an invisible room where a piano can clearly be heard being played on a record player. The piano can only be heard if your music setting on the options menu is on.

Climb up the ladder outside and to the far right of the dome, then go to the corner behind the staircase. This is the best location to use your shotgun because everyone will either go up the steps, ladder, or the metal beam to reach the top.

-Open the room that says "Help" during the third or fourth round to get a weapons supply that will give you the upper hand in a crucial battle. Note: There are four openings that the zombies will break through.

-Never open up the stairs; it just results in more zombies.

Sniping Gunner
Primary weapon - MP40 with aperture sight
Secondary Weapon - PTRS-41
Primary grenade - Frag
Secondary grenade - Smoke
Perk 1 - Bouncing Betties
Perk 2 - Overkill
Perk 3 - Reconnaissance
Vehicle Perk - Coaxial Machine Gun

Stealth Gunner
Main weapon - MP40 with suppressor
Side arm - Magnum
Primary grenade - Frag
Secondary grenade - Smoke
Perk 1 - Bomb Squad
Perk 2 - Camouflage
Perk 3 - Dead Silence
Vehicle Perk - Leadfoot

Hardcore mode class
Primary weapon - STG-44 with telescopic scope
Side arm - Magnum
Primary Grenade - Frag
Secondary Grenade - Tuban Gas
Perk 1 - Bandolier
Perk 2 - Camouflage
Perk 3 - Dead Silence
Vehicle perk - Anything desired

Sniper for hardcore mode
Primary Weapon - PTRS
Secondary weapon - PPSH with extended ammo
Primary Grenade - Frag
Secondary Grenade - Smoke
Perk 1 - Bouncing Betties
Perk 2 - Overkill
Perk 3 - Dead Silence
Vehicle Perk - Anything desired

Go to the room overlooking the garden, then go to the larger window and mantle over. You will be on a very thin ledge. Follow the ledge to the right and on your left is an even thinner wall. Follow the wall to the top of the castle and you will be there.

Play on Nacht Der Untoten in Co-op mode. By the window at the back where a truck can be seen out of, find a corner that is to the right of that window and have one player go there and crouch down. Have the other player jump on top of him, then have the player at the bottom stand up. You will now be inside of each other and are invincible as long as you remain immobile. If a zombie comes in, knife him. Shooting doesn't always work.

Unlock the following modes by performing the corresponding tasks:

MODE - HOW TO UNLOCK
Veteran mode - Reach level 32. It's a Co-op mode with stronger enemies.
Zombie mode - Complete campaign mode.

Unlock the following Submachine Guns by completing the corresponding tasks:

SUBMACHINE GUN - HOW TO UNLOCK
Aperture Sight - Finish marksman challenge 2.
Dual Magazine - Finish marksman challenge 3.
MP40 - Reach level 10.
PPSH - Reach level 41.
Round Drum - Finish marksman challenge 3.
Suppressor - Finish marksman challenge 1.
Thompson - Reach level 4.
Type 100 - Reach level 25.

Unlock the following grenades by reaching the corresponding levels:

GRENADE - LEVEL
Frag - Reach level 4.
Molotov Cocktail - Reach level 10.
N-74NT - Reach level 4.
Signal Flare - Reach level 4.
Smoke - Reach level 4.
Tabun Gas - Reach level 4.

Unlock the following machine guns by completing the corresponding tasks:

MACHINE GUN - HOW TO UNLOCK
BAR - Reach level 4.
Bayonet - Reach marksman challenge 2.
Bipod - Reach marksman challenge 1.
Browning M1919 - Reach level 61.
DP-28 - Reach level 13.
FG 42 - Reach level 45.
MG-42 - Reach level 33.
Type 99 - Reach level 4.

Unlock the following rifles by completing the corresponding tasks:

RIFLE - HOW TO UNLOCK
Aperture Sight - Finish marksman challenge 2.
Flash Hider - Finish marksman challenge 1.
Gewehr 43 - Reach level 7.
M1 Garand - Reach level 17.
M1A1 Carbine - Reach level 65.
Rifle Grenade - Finish marksman challenge 4.
STG-44 - Reach level 37.
Suppressor - Finish marksman challenge 1.
SVT-40 - Reach level 4.
Telescopic Sight - Finish marksman challenge 3.

Unlock the following bolt-action rifles by completing the corresponding tasks:

BOLT-ACTION RIFLE - HOW TO UNLOCK
Arisaka - Reach level 4.
Bayonet - Finish marksman challenge 1 and/or 2.
Kar98k - Reach level 41.
Mosin-Nagant - Reach level 21.
PTRS-41 - Reach level 57.
Rifle Grenade - Finish marksman challenge 2 and/or 3.
Sniper Scope - Finish marksman challenge 1.
Springfield - Reach level 4.

Unlock the following clan tag animations by entering the corresponding codes for your clan tag. These do not work with patched v1.04:

ANIMATION - CODE
An "o" bounces next to your clan tag. - "...."
Colors scroll left to right in your tag. - "cylc"
Red laser beam through the letters. - "cyln"
Bouncing tag - "move"
Rainbows scroll through your tag. - "rain"

Unlock the following alternate clan tag colors by entering the corresponding codes for your clan tag. These require patched v1.04:

COLOR - CODE
Gold tag - "gold"
Blue tag - "blue"
Cyan tag - "cyan"
Green tag - "grn"
Red tag - "red"
Yellow tag - "yelw"

Kill the following number of enemies in a row to unlock the corresponding bonuses:

KILLSTREAK - BONUS
Kill 3 Enemies in a row - Recon plane will display enemies on your team's radar.
Kill 5 Enemies in a row - Activate an artillery strike anywhere on the map.
Kill 7 Enemies in a row - Sick an angry pack of dogs on the enemy.

Death cards can be found in the following locations. Collect a death card to unlock its effect in Co-op mode:

1. Undead Soldier
Effect: Enemies come back from the dead.
Location: Close to the beginning of the "Eviction" mission. Its well hidden inside a drop-down location against the wall.

2. Suicide King
Effect: Fire explosive pistol rounds while downed.
Locatation: Near the middle of the "Hard Landing" mission. Its in a building on the lower level.

3. Vampire
Effect: You can only regenerate your health by getting kills.
Locatation: Near the middle of the "Burn em out" mission. Its near the back area of a bunker just before the second mortar position. Its a bit difficult to see as its hiding in the shadows.

4. Body Armor
Effect: Enemies die by headshot only.
Locatation: near the middle of the "Ring of Steel" mission. The card is located next to a dead soldier in the exterior section of the asylum. Right next to a wall connected to the asylum.

5. Painkiller
Effect: Shoot co-op teammates to revive them.
Locatation: Close to the beginning-middle of the "Blowtorch & Corkscrew" mission. Its on the left well as you advance to the second bunker. Look for a soldier hanging upside down along the wall.

6. Flak Jacket:
Effect: Enemies take less explosive damage.
Location: Near the end of the "Relentless" mission. It doesnt matter which passage you take, as the death card is located after that. Its midway down the hall in a corridor that connects the paths.

7. Thunder
Effect: Headshots cause enemies to explode.
Location: in the beginning in "Semper Fi". Its in a shack right at the start.

8. Sticks & Stones
Effect: Your weapon arsenal consists of a knife and a bunch of rockets.
Location: Near the end of the "Their Land , Their Blood" mission. Its hidden inside the barn. Search the stalls next to a dead soldier and a couple of dead cows.

9. Paintball
Effect: Gunfire turns a little more colorful.
Location: In the beginning of the "Heart of the Reich" mission. Its located in a closed off subway entrance opposite of your start location.

10. Cold Dead Hands
Effect: Enemies take their weapons with them to the grave.
Location: In the beginning of the "Vendetta mission". Its located behind the bar, inside the first building Reznov takes you through.

11. Hard Headed
Effect: Enemies take less bullet damage.
Location: Near the end of the mission in "Little Resistance". Its just outside the final building to the right of the entrance.

12. Berserker
Effect: Get 3 kills in 5 seconds to unleash Berserker.
Location: near the middle of the "Breaking Point" mission. After clearing all 4 mortar pits, look in the small shack located in the south of the area.

13. Victory
Effects: Limited HUD , Friendly Fire = On , Bleed Out time is cut in half.
Location: Near the beginning of the "Downfall" mission. Between the staircase and the theater, your soldiers break through a door on your right. Inside, find the last Death Card.

Go straight to the wall by Target A (search and destroy mode) then find the blood stain, sprint into and out of that corner repeatedly until you fall through then duck down crawl through the gap and your under the level from here you can kill people but they cant get you - be warned you cant throw grenades through to the level. Also from there if you want to get out of the whole level instead of under it just walk backwards towards the wall on your right you will pass through but don't go too far or you die, from here you can see through nearly all walls and kill people without being spotted.

Change your name to the following colors by entering the corresponding word as your clan tag:

COLOR - WORD
Red text - Enter red as a Clan Tag.
Green text - Enter grn as a Clan Tag.
Blue text - Enter blue as a Clan Tag.
Cyan (light blue) text - Enter cyan as a Clan Tag.
Yellow text - Enter yelw as a Clan Tag.
Rainbow text - Enter rnbw as a Clan Tag.

Unlock the following weapons and their attachments by performing the corresponding tasks:

-Bolt Action Rifles
Springfield (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Sniper Scope - Already available (increases accuracy and range).
Bayonet - Complete Marksman Challenge 1 (increases melee attack range).
Rifle Grenade - Complete Marksman Challenge 2 (grenade launcher attachment, replaces Perk 1 slot).

Arisaka (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Sniper Scope - Complete Marksman Challenge 1 (increases accuracy and range).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).
Rifle Grenade - Complete Marksman Challenge 3 (grenade launcher attachment, replaces Perk 1 slot).

Mosin-Nagant (Obtained at Level 21)
ATTACHMENT- HOW TO UNLOCK
Sniper Scope - Complete Marksman Challenge 1 (increases accuracy and range).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).
Rifle Grenade - Complete Marksman Challenge 3 (grenade launcher attachment, replaces Perk 1 slot).

Kar98k (Obtained at Level 41)
ATTACHMENT- HOW TO UNLOCK
Sniper Scope - Complete Marksman Challenge 1 (increases accuracy and range).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).
Rifle Grenade - Complete Marksman Challenge 3 (grenade launcher attachment, replaces Perk 1 slot).
PTRS-41 (Obtained at Level 57.

-Rifles
SVT-40 (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Flash Hider - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Telescopic Sight - Complete Marksman Challenge 3 (enhanced telescopic sight).

Gewehr 43 (Obtained at Level 7)
ATTACHMENT- HOW TO UNLOCK
Suppressor - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Telescopic Sight - Complete Marksman Challenge 3 (enhanced telescopic sight).
Rifle Grenade - Complete Marksman Challenge 4 (grenade launcher attachment, replaces Perk 1 slot).

M1 Garand (Obtained at Level 17)
ATTACHMENT- HOW TO UNLOCK
Flash Hider - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).
Sniper Scope - Complete Marksman Challenge 3 (increases accuracy and range).
Rifle Grenade - Complete Marksman Challenge 4 (grenade launcher attachment, replaces Perk 1 slot).

STG-44 (Obtained at Level 37)
ATTACHMENT- HOW TO UNLOCK
Flash Hider - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Telescopic Sight - Complete Marksman Challenge 3 (enhanced telescopic sight).

M1A1 Carbine (Obtained at Level 65)
ATTACHMENT- HOW TO UNLOCK
Flash Hider - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Bayonet - Complete Marksman Challenge 3 (increases melee attack range).
Box Magazine - Complete Marksman Challenge 4 (increases ammunition capacity).

-Sub Machine Guns
Thompson (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Suppressor - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Round Drum - Complete Marksman Challenge 3 (increased ammunition capacity).

MP40 (Obtained at Level 10)
ATTACHMENT- HOW TO UNLOCK
Suppressor - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Dual Magazine - Complete Marksman Challenge 3 (increased ammunition capacity).

Type 100 (Obtained at Level 25)
ATTACHMENT- HOW TO UNLOCK
Suppressor - Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
Aperture Sight - Complete Marksman Challenge 2 (precision sight).
Box Magazine - Complete Marksman Challenge 3 (increases ammunition capacity).

Ppsh (Obtained at Level 41)
ATTACHMENT- HOW TO UNLOCK
Aperture Sight - Complete Marksman Challenge 1 (precision sight).
Round Drum - Complete Marksman Challenge 2 (increased ammunition capacity).
Shotguns

M1897 Trench Gun (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Grip - Complete Marksman Challenge 1 (vertical foregrip to reduce recoil, replaces Perk slot 1).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).
Double Barreled Shotgun (Obtained at Level 29.
Grip - Complete Marksman Challenge 1 (vertical foregrip to reduce recoil, replaces Perk slot 1).
Sawed-Off Shotgun - Increases weapon spread, but reduces accuracy.

-Machine Guns
Type 99 (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).
Bayonet - Complete Marksman Challenge 2 (increases melee attack range).

BAR (Obtained at Level 4)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).

DP-28 (Obtained at Level 13)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).

MG 42 (Obtained at Level 33)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).

FG 42 (Obtained at Level 45)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).
Telescopic Sight - Complete Marksman Challenge 2 (enhanced telescopic sight).

Browning M1919 (Obtained at Level 61)
ATTACHMENT- HOW TO UNLOCK
Bipod - Complete Marksman Challenge 1 (reduces motion for more accuracy).

-Pistols
Colt M1911 (Obtained Level 4)
Nambu (Obtaned Level 4)
Walther P38 (ObtainedLevel 4)
Tokarev TT-33 (Obtained at Level 21)
.357 Magnum (Obtained at Level 49)

-Primary Grenades
Frag (Obtained at Level 4.
N 74 ST (Obtained at Level 4.
Molotov Cocktail (Obtained at Level 10

-Special Grenades
Smoke (Obtained at Level 4)
Tabun Gas (Obtained at Level 4)
Signal Flare (Obtained at Level 4)

Reach rank 13 in Online Multi-player mode to unlock Hardcore Team Deathmatch mode.

Reach level 32 to unlock Veteran mode, a Co-op mode with higher difficulty enemies.

When you upgrade the Colt M1911, the bullets will explode.

Find the following Death Cards on the following locations and in the indicated level to unlock the corresponding effects in Co-op mode:

Thunder
Level - Semper Fi (Eight of Hearts)
Effect - Headshots cause enemies to explode.
Location - At the very beginning after leaving the shack, you will see another shack to the right. The card is inside.

Hard Headed
Level - Little Resistance (Four of Clubs)
Effect - Enemies take less bullet damage.
Location - At the end of the level before going into the last building, look to the right. The card is in a corner of bushes.

Suicide King
Level - Hard Landing (King of Hearts)
Effect - Fire explosive pistol rounds while downed.
Location - About halfway through the mission you will see a big building with a mini-trench outside. Enter the building and go into the lower level. The card is to the right when you go into the room with the stairs.

Cold Dead Hands
Level - Vendetta (Five of Diamonds)
Effect - Enemies take their weapons with them to the grave.
Location - After the sniper section at the first part of the mission, Reznov leads you through a building. Follow the bar around to the end to find the card.

Sticks & Stones
Level - Their Land, Their Blood (Joker)
Effect - Your weapon arsenal consists of a knife and rocks.
Location - Destroy the tanks and go through the barn. Search the stalls to your right to find the card.

Vampire
Level - Burn 'em Out (Queen of Hearts)
Effect - Can only recharge your health by getting kills.
Location - Just before the second mortar position is a bunker to the left. The card is inside.

Flak Jacket
Level - Relentless (Nine of Diamonds)
Effect - Enemies take less explosive damage.
Location - At the end of the mission, take either the left or right path. Eventually the paths will reconnect. The card is about half way down the path.

Body Armor
Level - Ring of Steel (Jack of Spades)
Effect - Enemies die by headshot only.
Location - Enter the asylum, the immediately go to the left. The card is in the far bottom left corner.

Undead Soldier
Level - Eviction (Ace of Spades)
Effect - Enemies come back from the dead.
Location - During the first half of the mission, just after the kitchen area, you will eventually see a room to your right that has a large hole in it. Drop down to find the card.

Painkiller
Level - Blowtorch & Corkscrew (Ten of Clubs)
Effect - Shoot downed Co-Op teammates to revive them.
Location - Go to the left as you move toward the second bunker. A Japanese soldier hanging upside down is near the card.

Berserker
Level - Breaking Point (Three of Diamonds)
Effect - Get three kills in five seconds to become berserk.
Location - Clear all of the four mortar pits, then go to the small shack in the south of this area. The card is inside.

Paintball
Level - Heart of the Reich (Six of Clubs)
Effect - Paintball guns.
Location - The card is in the closed-off subway entrance across the street from the start of the mission.

Victory
Level - Downfall (Two of Spades)
Effect - Limits your HUD, turns on friendly fire, and bleed out in half the time.
Location - Before you get to the theater, some of your allies will break through a door to your right. The card is past that door.

On "Airfield, head to the first side, which is where you spawn behind the big building then go out to the field. Instead, go inside the building and look around at the pillars and windows, then go upstairs to the left. Look around and you'll notice it is the same building in the Nacht Der Untoten (zombie) mission, except all the entrances are walled up or blocked by an invisible wall.

Use the following hint to destroy the other tanks faster and a bit easier. Shoot the tanks in the treads to destroy them in two shots about 90% of the time, rather than an average of four shots. When shooting at the tanks, it helps to move from side to side. Those tanks do not have great aim, depending on the difficulty setting. Try waiting just a moment between shots to slightly increase your accuracy.

In Spectator mode on Cliffside, look down the cliff at the beach. To the left there is a small crater on the beach where a mortar shell has hit. Fly down through the crater and keep going down to eventually go into some invisible water. Come up out of the water a bit and look around to see a large bush nearby in the mist. It is just floating there very far under the map.

Go into the large pit as a spectator to hear the Red Army shouting their battlecry of "URA! URA! URA!". Strangely enough, you cannot hear them at all from within the actual map boundaries (unless you are unfortunate enough to fall in).

The trench gun or the double-barrel shotgun are the best because it is a small map.

At the start of the mission, move from where you spawn and follow Sgt. Reznov to the surrendering Nazi. After you kill the Nazi, turn left to find a table and the double shotgun.

Go to Free Spectating mode and look around the map near the Japanese spawn side for a radio tower with Japanese flags on it. Go above the tower and slightly beside it, then wait a minute to hear a German or Russian commander voice.

-After the boat crashes, call in an air strike on the corresponding location. Run up to the beach and move to the right to find a small puddle at the right side of the beach. Stand in it briefly, then move towards the middle of the beach to find a smaller puddle. Stand in that puddle briefly, then move towards the far left side of the beach. Stand briefly in the puddle in the barb wire. After a few seconds, the screen will shake and you will hear strange voices before four lion statues rise out of the ground with alien ray guns in their mouths.

-If you just stand in the last puddle and not the others, you will still hear the weird voices and get the ray guns.

Start any Nazi Zombie game and unlock the door to the Mystery Box room. Go to the Mystery Box and go over to the right, then look at a table to find a radio. Shoot a bullet at the radio and wait a few seconds to hear random sorts of music such as rock, disco, opera, and some in-game music such as the Russian victory song, the last level music, or the Japanese combat music. The music will stop in between rounds but will then start again and every player in game can hear it.

At the end of each round, leave one last zombie alive. When it has entered the building, throw a grenade at it to blow off its legs so it crawls slowly on the ground, giving you plenty of time to patch up any windows you need and prepare for the nexxt round. The next round won't begin until the crawling zombie is killed, and he is easy to evade. When you are ready, kill him and the round will end.

-This works better in online multi-player mode. After the first five or so waves, open the upstairs but not the door. Then, open the other stairs leading into the gun room. You will only need to worry about that room and the stairs. Have two people watch the stairs. The room has less obstructions to get caught up on and more space to move and evade. If overwhelmed, you can open the door but the next round will probably be your last.

-There are two ways to do this trick. Upstairs, over the first starting room, is a room with one window and a doorway with a window view. Use that door way to bottleneck zombies while someone else guards the stairwell and window. You can either unlock the door then the far stairs to keep your back free. Alternately, unlock the first stairs, leaving no protective sides. The only downside is that eventually you will need ammo. This works well online as long as you work together.

-Get to level three and leave a Crawler. Open the door with steps (not the ramp) and open the door that leads to the Thompson. Clear the debris and jump down to turn the power on. Then run out and make a right. Keep going straight to pass two windows on your right and a door on your left and right. Do not open the doors. From this area, kill the zombies that come down the path and have someone guard the window in the back. For the dogs, go to mainframe and hide by the fence in the corner by the window. When the dogs are cleared, go back to the path and repeat this. Do not forget to leave a Crawler or a zombie in the window. Also be careful with getting the nukes so you do not kill the last zombie and can get perks or whatever else.

For the first few rounds, allow the zombies to break down the boards and come inside. Use your pistol or knife to kill them to gain more points than by shooting them once in the head. A knife to the head gives 130 points per kill. Once all of the zombies are dead, patch up the boards. You will have much more money this way than if you simply killed them with guns. Note: After level 3, the zombies are too strong to be taken down this way.

When you have over 950 points, go to the door marked "HELP" to find a box on the far left that you can buy a random weapon from.

First, open the help door once you have enough points to buy a Thompson off the wall. Buy it, then make a crawler with a grenade. There are four or five army helmets scattered around the first floor. Shoot all of the army helmets with the Thompson (also use your knife) into the mystery box, then buy a gun and the Ray Gun will appear. Note: This takes some time.

On the Nazi side at Upheaval on, go to the left into the building. Inside you will see a board next to the door. Look carefully to see a chicken with a knife through it. You can shoot the chicken off, but to get the knife off you need an explosive.

In the first Russian mission, during the part where you must protect your friends below on the streets with the sniper rifle, you must move to another position with some Nazis with dogs . If you manage to kill a Nazi or dog without using the scope on the sniper (no-scope), Dimitri will say "No Scope!!? Good!!" in an enthusiastic voice.

Find some dead bodies, then run up to them and make sure no one else is around besides your teammates. Get down into laying position and crawl into what appears to be the body of the dead person, so it looks like there are fragments of the body around your HUD. Lower your gun while having it high enough to still see what is coming. This trick will make it harder for people to see you unless they are paying close attention to the ground. The flaws to this trick is that people can sneak up from behind and see you since you can only see in one direction without moving. After a few kills, move to another location because other players will pick up on your trick and grenade or rush you.

Whenever you run out of ammo or are running low on any mission in Solo mode, find a non-essential teammate (someone not involved in the story line) and aim the reticule next to his head or torso. Knife the air and move slightly as you do so toward them so that the reticule is over them. If done correctly, your teammate will die and drop his weapon. The difficulty setting doesn't matter. Non-essential teammates are replaced when you walk into a battle. If the teammate does not die but keeps getting back up, it means they are essential to the story (for example, Sgt. Roebuck and Sgt. Rezenov).

On Modern Warfare is a allied Russian soldier named Dmitri Petrenko with the rank of corporal in the "Safehouse" mission. In theWorld At War Campaign mode, the character you play as for as the Russians is Dmitri Petrenko with the rank of private.

There will be a section where you will be asked to "Save Private Ryan", a clear reference to the critically acclaimed film Saving Private Ryan.

Reach Prestige rank 10 to unlock the Sergeant Reznov gamerpic.

Reach Prestige rank 1 to unlock the Sergeant Roebuck gamerpic.

This trick is only possible in Co-op mode on Breaking Point. Get near a box of mortars and have a partner stand on top. There must be enemies around to kill him. When he goes down, walk over to him to see the message "Press and hold X to pick up and prime". Hold X and you will pick up a mortar and see the revival status bar begin to fill. When he is revived, you will put the mortar away as you would the needle.

Use a flamethrower somewhere under the Castle map to reveal the message "Caulk Shadow" on the walls.

When you get to the part with the sniper rifle and the Nazis start using bazookas, look at one in zoomed view. If he is not shooting at you, leave him for awhile and go back. He will now be using a STG-44, but is holding it like a bazooka.

Go to the path that circles around the woods and the map and continue walking until you see a series of Japanese statues and square rocks. Go to the statue that's lit up and enclosed by other square rocks; it stands out from the others and should be facing you. Get as close to the statue as possible and wait a while to start hearing bells, chimes, or metal tools rattling against each other loudly. Although the sounds are coming from in front of you, nothing is there.

-On multiplayer, select a gun with a bipod attachment. Lay down, deploy the bipod, and press Left Analog-stick Up. The ammo bar will disappear and can now fire as long as desired without reloading or running out of ammo.

-Get a machine gun that can be mounted and mount it onto something or just the plain floor. Press Left Analog-stick Up and your ammo bar will disappear, giving you ammunition only when it is mounted.

When a car is on fire, jump onto its roof to get hurt by it but not die.

Unlock this achievement by first opening the door that has "Comm" on it in Shi No Numa and then the door where the perk machine is located. There is a door on each side of the perk machine; go in the one on the right. As soon as you enter that door, take a left to find a black phone sitting on the table next to a radio. Go to the phone and hold [Reload]. You may need to do this a few times. You will start to hear numbers being dialed, it will start to ring, and the achievement will unlock.

An easy way to get this achievement is by leaving all but one zombie before they tear down the window boards. Let the last zombie live, and while he is tearing down the window boards, quickly repair them. Although you will not get points for repairing the boards, you will get the achievement.

First, have all the teleporters activated and the Pack A Punch machine available for usage. Get a Crawler so you have time to get in position and get the achievement. Go out of the left door from the position you spawn at or the right door if you are facing the Pack A Punch machine. Once you see the fence where the zombies can break in before the next door, slightly look through the gap to the left of the wood to see a circuit breaker in the distance. Take out your upgraded gun and shoot the breaker. This trick only works with guns upgraded in the Pack A Punch machine and by shooting the breaker. Once this is done, a sequence will begin and you will unlock the achievement.

While playing in Solo mode, get a crawler or a very slow moving zombie at the end of round three. Open the door to your left of where you spawn and to the right of the Pack A Punch machine if you are facing it, then the next door following it as well as the debris from the stairs. Fall off, activate the power, go back, and open the door across the bridge, then activate the teleporter and come back to it. Crouch in the corner directly below the black triangle above and use the Right Analog-stick to turn. Finally, stay in the back corner of the teleporter and wait for the last zombie to appear. Kill it. Once this is done, stay exactly in the same position you are at and the rounds will just skip by. You won't see people but you will hear them. This is the same for dogs. Nothing can find and attack you. By doing this you can make it to round infinity, but once you leave you are on your own. You will have unlocked the achievement by round 20.

After you get to the sniping spot to kill General Amsel, shoot all your pistol ammunition, then switch to your sniper rifle and switch back to your pistol. You should now have 80 rounds of ammunition instead of only 13.

On the "Vendetta" mission, after you shoot General Amsel's guards and move up to the car with the sergeant, a group of Nazis will appear down the street. Instead of following the sergeant, stay near the car and wait for three of the Nazis to get in a line, then shoot.

Go to the top sniping post at the very right of the map and have someone stand on the stone stick going upwards toward the wall. Getout on the ledge, then run (do not sprint) toward him, jump, and bayonet him. If done correctly, you will launch up on top of the roof. From there you can travel over the entire roof. Be careful; you can get stuck.

Once you reach 750 points, open the door to the right of the mainframe with the carbine in it. When you hear the sound before the dogs arrive, have one person lay down in the corner. Note: This is the corner if you turn left immediately after you enter the room. Have the other person jump on top of him, then have both players crouch down. If done correctly, the dogs will go in the corner of the room to the left of where you are and will remain there. When they are there, shoot them. Note: This doesn't work with zombies.

ACHIEVEMENT - HOW TO UNLOCK
Carlson's Raiders (10 points) - Complete 'Semper Fi' on any difficulty in Solo mode.
Stormed Peleliu (15 points) - Establish a beachhead on the island of Peleliu on any difficulty in Solo mode.
The Last Stand (20 points) - Survive the land and air conflict surrounding Okinawa on any difficulty in Solo mode.
Stabbed in the Heart (20 points) - Complete all missions on the Eastern Front on any difficulty setting in Solo mode.
Get Your Hands Dirty (30 points) - Complete 'Semper Fi' on Veteran difficulty in Solo mode.
Saved Private Ryan (10 points) - Save the soldier before he burns to deathin Solo or co-op mode.
Bloody Peleliu (30 points) - Complete 'Little Resistance' on Veteran difficulty in Solo mode.
Weapon of Mass Destruction (15 points) - Radio in a naval bombardment that kills at least 4 Japanese soldiersin Solo or co-op mode.
The Sword Is Broken (30 points) - Complete 'Hard Landing' on Veteran difficulty in Solo mode.
No Safe Place (15 points) - Burn an enemy out of a tree with the flamethrower in 'Hard Landing' in Solo or co-op mode.
Architect (30 points) - Complete 'Vendetta' on Veteran difficulty in Solo mode.
The Professional (15 points) - Shoot all of Amsel's henchmen, including their attack dog, without reloading in Solo mode.
Gunslinger (15 points) - Assassinate General Amsel with a pistol shot in Solo mode.
The Hammer Strikes (30 points) - Complete 'Their Land, Their Blood' on Veteran difficulty in Solo mode.
Scorched Earth (30 points) - Complete 'Burn'em Out' on Veteran difficulty in Solo mode.
Firestarter (15 points) - Complete a mission using only the flamethrower. Melee, grenades and explosives are OKin Solo or co-op mode.
Fearless (30 points) - Complete 'Relentless' on Veteran difficulty in Solo mode.
Hell on Wheels (30 points) - Complete 'Blood and Iron' on Veteran difficulty in Solo mode.
Iron Fist (15 points) - Destroy all towers and bunkers in 'Blood and Iron'in Solo or co-op mode.
No Return (30 points) - Complete 'Ring of Steel' on Veteran difficulty in Solo mode.
Ruthless (15 points) - Kill 15 enemies while mounted on a tank in 'Ring of Steel'in Solo or co-op mode.
When It Rains, It Pours (30 points) - Complete 'Eviction' on Veteran difficulty in Solo mode.
Shot in the Dark (10 points) - Kill 10 enemies while the lights are out in the subway in 'Eviction'in Solo or co-op mode.
One Bad Gato (30 points) - Complete 'Black Cats' on Veteran difficulty in Solo mode.
The Sum of All Zeros (15 points) - Down 45 Japanese Zeros in 'Black Cats' in Solo mode.
Lights Out! (10 points) - In 'Black Cats', blast out all of the spot lights in the Japanese cargo convoy in Solo mode.
Blowtorch & Corkscrew (30 points) - Complete 'Blowtorch & Corkscrew' on Veteran difficulty in Solo mode.
Setting of the Sun (30 points) - Complete 'Breaking Point' on Veteran difficulty in Solo mode.
Mortar-dom (10 points) - Kill 8 Japanese with thrown mortars in 'Breaking Point'in Solo or co-op mode.
Guardian Angel (10 points) - In the final battle for Okinawa, save Sergeant Roebuckin Solo or co-op mode.
For the Motherland (30 points) - Complete 'Heart of the Reich' on Veteran difficulty in Solo mode.
Bearing the Burden (30 points) - Complete 'Downfall' on Veteran difficulty in Solo mode.
Rough Economy (15 points) - Kill 3 enemies with a single bulletin Solo or co-op mode.
Close Shave (10 points) - Survive a Banzai attack in Solo mode.
Snake in the Grass (15 points) - Take out a Japanese soldier while he is lying in wait in the grassin Solo or co-op mode.
Grave Robber (15 points) - Collect all Death Cards in the game in Solo mode.
Kamikaze (15 points) - Complete any level on Regular difficulty or higher using only melee and grenades in Solo mode.
Throw a Six and a Half (15 points) - On Hardened or Veteran difficulty, Complete a level without dying in Solo mode.
Purple Heart (5 points) - When staring into the face of adversity, show courage and persevere.
War Hero (40 points) - Complete the game on any difficulty in Solo mode.
Hardened War Hero (100 points) - Complete the game on Hardened or Veteran difficulty in Solo mode.
Get Your Left Foot Wet (30 points) - Complete a match in Campaign Co-Op mode over Xbox LIVE in online co-op mode.
Get Your Right Foot Wet (30 points) - Complete a match in Competitive Co-Op mode over Xbox LIVE in online co-op mode.
Blue Ribbon (25 points) - Complete a 4-player Competitive Co-Op match in 1st place over Xbox LIVE in online co-op mode.
It's All About Prestige (0 points) - Reach the first level of Prestige.
Go Get Some Sun (0 points) - Reach level 55 on your tenth Prestige.

"Map Pack 2" achievements
ACHIEVEMENT - HOW TO UNLOCK
Soul Survivor (50) - Reach round 15 in Nazi Zombies without getting revived.
Hammer Time (10) - Repair 200 window boards in a single game.
Weapon of Minor Destruction (20) - Kill no more than one zombie with a nuke.
Big Baller (30) - Earn 75,000 points in a single Nazi Zombie game.
Perk-a-Holic (20) - Have all four perks simultaneously active in a game of Nazi Zombies.
Big Brawler (30) - Get 10 consecutive zombie melee kills before Insta-Kill expires.
It's a Trap! (20) - Kill at least one zombie with three different traps in a single round.
Fertilizer Man (30) - Kill 200 zombies in a single game.
Deadhead (30) - Get 150 zombie headshots in a single game.
Dead Air (10) - Must have been a wrong number.

"Map Pack 3" achievements
ACHIEVEMENT - HOW TO UNLOCK
Locksmith! (25 points) - Open all doors in the map.
The Might of the Monkey! (25 points) - Use the Monkey Bomb.
Wacker Packer! (25 points) - Upgrade any weapon in Pack A Punch.
Frequent Flyer! (25 points) - Use the teleporter 8 times.
40 Knives! (25 points) - Kill 40 zombies with the bowie knife.
Der Electrician! (25 points) - Link all teleport pads before round 7.
Acquire Waffle Weapons! (25 points) - Obtain the Ray Gun, DG-2, and Monkey Bomb at the same time.
Perkaholics Anonymous! (25 points) - Survive until round 20 without buying a single Perk.
Pack Addict! (25 points) - Upgrade 5 weapons at the Pack a Punch Machine.
Elevate Your Senses! (25 points) - Activate the Fly Trap.

Put Bouncing Bettys in your class, then find a dead body and place a Betty in it. No one can shoot at it to defuse it nor see it. This tactic is considered "Japanese" because in the game the Imperial Army booby trap dead bodies.

After dying in an online match in HQ and are watching your teammates fight, try to find someone with a MG42. If you look at the weapon in third person view there will be no clip on the gun. However, in first person view there is a clip on the left side on the gun.

Unlock the following shotguns by completing the corresponding tasks:

SHOTGUN - HOW TO UNLOCK
Bayonet - Finish marksman challenge 2.
Double-Barreled Shotgun - Reach level 29.
Grip - Finish marksman challenge 1.
M1897 Trench Gun - Reach level 4.

Unlock the following numbers of weapon slots by reaching the corresponding prestige ranks:

SLOT - PRESTIGE RANK
6 slots - Reach 1st prestige
7 slots - Reach 2nd prestige
8 slots - Reach 4th prestige
9 slots - Reach 7th prestige
10 slots - Reach 10th prestige

Unlock the following items by completing the corresponding challenges:

ITEM - HOW TO UNLOCK
Aperture Sight for Gewehr 43 - Get 75 kills with the gewehr 43.
Aperture Sight for M1A1 Carbine - Get 75 kills with the M1A1 carbine.
Aperture Sight for MP40 - Get 75 kills with the MP40.
Aperture Sight for PPSh-41 - Get 25 kills with the PPSh-41.
Aperture Sight for STG-44 - Get 75 kills with the STG-44.
Aperture Sight for SVT-40 - Get 75 kills with the SVT-40.
Aperture Sight for Thompson - Get 75 kills with the thompson.
Aperture Sight for Type 100 - Get 25 kills with the type 100.
Bayonet for Arisaka - Get 75 kills with the arisaka.
Bayonet for Kar98K - Get 75 kills with the kar98K.
Bayonet for M1 Garand - Get 75 kills with the M1 garand.
Bayonet for M1897 Trench Gun - Get 75 kills with the M1897 trench gun.
Bayonet for M1A1 Carbine - Get 100 kills with the M1A1 carbine.
Bayonet for Mosin-Nagant - Get 75 kills with the mosin-nagant.
Bayonet for Springfield - Get 25 kills with the springfield.
Bayonet for Type 99 - Get 75 kills with the type 99.
Bipod for BAR - Get 25 kills with the BAR.
Bipod for Browning M1919 - Get 25 kills with the browning M1919.
Bipod for DP-28 - Get 25 kills with the DP-28.
Bipod for FG42 - Get 25 kills with the FG42.
Bipod for MG42 - Get 25 kills with the MG42.
Bipod for Type 99 - Get 25 kills with the Type 99.
Box Magazine for M1A1 Carbine - Get 150 kills with the M1A1 carbine.
Dual Magazines for MP40 - Get 150 kills with the MP40.
Extended Clip for Type 100 - Get 25 kills with the type 100.
Flash Hider for M1 Garand - Get 25 kills with the M1 garand.
Flash Hider for M1A1 Carbine - Get 25 kills with the M1A1 carbine.
Flash Hider for STG-44 - Get 25 kills with the STG-44.
Flash Hider for SVT-40 - Get 25 kills with the SVT-40.
Grip for Double Barreled Shotgun - Get 25 kills with the double barreled shotgun.
Grip for M1897 Trench Gun - Get 25 kills with the M1897 trench gun.
Rifle Grenade for Arisaka - Get 150 kills with the arisaka.
Rifle Grenade for Gewehr 43 - Get 150 kills with the gewehr 43.
Rifle Grenade for Kar98K - Get 150 kills with the kar98K.
Rifle Grenade for M1 Garand - Get 100 kills with the m1 garand.
Rifle Grenade for Mosin-Nagant - Get 150 kills with the mosin-nagant.
Rifle Grenade for Springfield - Get 75 kills with the springfield.
Round Drum for PPSh-41 - Get 75 kills with the PPSh-41.
Round Drum for Thompson - Get 150 kills with the thompson.
Sawed-Off Shotgun - Get 75 kills with the double barreled shotgun.
Sniper Scope for Arisaka - Get 25 kills with the arisaka.
Sniper Scope for Kar98K - Get 25 kills with the kar98K.
Sniper Scope for M1 Garand - Get 150 kills with the M1 garand.
Sniper Scope for Mosin-Nagant - Get 25 kills with the mosin-nagant.
Suppressor for Gewehr 43 - Get 25 kills with the gewehr 43.
Suppressor for MP40 - Get 25 kills with the MP40.
Suppressor for Thompson - Get 25 kills with the thompson.
Suppressor for Type 100 - Get 25 kills with the type 100.
Telescopic Sight for FG42 - Get 75 kills with the FG42.
Telescopic Sight for STG-44 - Get 100 kills with the STG-44.
Telescopic Sight for SVT-40 - Get 150 kills with the SVT-40.
Telesopic Sight for Gewehr 43 - Get 100 kills with the gewehr 43.

Find the following sniper locations in the corresponding multiplayer maps:

Airfield
In the middle of the map, there is a 2-storyconcrete building. Place satchels or bouncing bettys. There is also alarge white estate with a ladder and staircase in front of it.

Asylum
-On the right of the map, go up the stairs to a long hallway. Turn right and go to the end to find a location where you can snipe people down below through the opening, or you can crouch behind the boxes and snipe people trying to get in.

-In the middle of the map, on the second floor (above the bathroom), there is a balcony to snipe from. You can either guard the doorway, snipe people in the courtyard, or snipe someone in the room mentioned above.

Castle
There is a small room overlooking the gardenand the front staircase. Climb the ladder or go upstairs to get to it.Another spot is a small room that has a clear sight into the roommentioned above. To get to this room, go to the bottom of the map andclimb up the staircase. You should be on a wooden porch that connectsto the gardens. Just turn left and you will be in the room.

Cliffside
There are two concrete bunkers in this map. Goto the one on the edge of the cliff. You can snipe people as they runby and shoot people trying the get in from behind.

Courtyard
-At the end of the courtyard, go into the shack and turn right. Use part of the wall that is jutting out to hop into the tree.

-There is a shack at the bottom left of the courtyard. Go through and keep going. Turn right and mantle over the wall, then turn right again and you should see boxes that you can climb. Climb on them to have a perfect view of the entire area.

Dome
There is a platform with a ladder on the sideof the building. To get to this platform, you can either climb theladder or go up the stairs inside. This spot connects to a ledge insidethe building.

Downfall
There is a bunker/cave in the upper leftcorner of the map (second row of buildings). This bunker has a clearshot of enemy respawn points and good protection from tanks. Make sureto use bouncing bettys.

Hangar
On the second floor of the hangar is a small room. Climb up the rubble pile on the side of the building to get to it.

Makin
Go to the circular building and look throughthe stair entrance. There should be a hut with two rectangular windowsoverlooking the sandy area. Also, there is a tall building on the waterwith windows overlooking the whole map.

Outskirts
Inside the church tower look through the oval window, and you will see a white building with a small balcony in the distance.

Roundhouse
There is a platform/hallway that goes overthe middle of the map. To get to it, go behind the trashed locomotives.Climb up the staircase and turn left at the round platform. You shouldhave a good view of the whole roundhouse in the middle of the map.

Upheaval
Towards the top of the map, there is building with two windows that overlooks the whole area.

Unlock the following perks in the indicated slot by performing the corresponding tasks:

Perk Slot 1
PERK - HOW TO UNLOCK
Special Grenade x3 - Reach level 4 (three special grenades, no smoke).
Satchel Charge x2 - Reach level 4 (two remote detonation explosives).
M9A1 Bazooka x2 - Reach level 4 (bazooka with two rockets).
Bomb Squad - Reach level 16 (seek out enemy explosives).
Bouncing Betty x2 - Reach level 24 (two pressure activated mines).
Bandolier - Reach level 40 (extra ammunition magazines).
Primary Grenade x2 - Reach level 44 (two primary grenades).
M2 Flamethrower - Reach level 65 (projects a controlled stream of fire).

Perk Slot 2
PERK - HOW TO UNLOCK
Stopping Power - Reach level 4 (increased bullet damage).
Fireworks - Reach level 4 (higher explosive weapon damage).
Flak Jacket - Reach level 4 (reduce explosive damage).
Gas Mask - Reach level 4 (protect against Tabun Gas).
Juggernaut - Reach level 4 (increased health).
Camouflage - Reach level 12 (undetectable to enemy recon planes).
Sleight Of Hand - Reach level 28 (faster reload).
Shades - Reach level 32 (reduce intensity of signal flares).
Double Tap - Reach level 36 (increased rate of fire).
Overkill - Reach level 56 (carry two primary guns, no pistol).

Perk Slot 3
PERK - HOW TO UNLOCK
Deep Impact - Reach level 4 (deeper bullet penetration).
Extreme Conditioning - Reach level 4 (sprint for longer distances).
Steady Aim - Reach level 4 (increased hip fire accuracy).
Toss back - Reach level 6 (reset fuse of picked up grenades).
Second Chance - Reach level 9 (revive downed allies).
Martyrdom - Reach level 20 (drop a live grenade when killed).
Fireproof - Reach level 48 (reduce fire based weapon damage).
Dead Silence - Reach level 52 (less sound when you move).
Iron Lungs - Reach level 60 (longer breath hold while sniping).
Reconnaissance - Reach level 64 (show enemy dogs, artillery, and tanks).

Vehicle Perks
PERK - HOW TO UNLOCK
Water Cooler - Reach level 4 (decreased turret overheat).
Greased Bearings - Reach level 4 (increased turret rotation speed).
Ordnance Training - Reach level 12 (decrease reload time of turrets).
Lead Foot - Reach level 28 (increases tank top speed).
Coaxial Machine Gun - Reach level 40 (driver controlled machine gun).

Complete Campaign mode to unlock Zombie mode, a four-player Co-op mode that pits you against endless waves of Nazi zombies. Alternately, get invited to play in a Zombie mode game in Co-op mode and it will then become unlocked permanently on your own game.

There are two concrete bunkers on the Japanese spawn side of the map. Go into the one at the top of the hill (with Japanese Flags on it) in Spectator mode, then go through one of the little windows into the back area of the bunker. Turn around and turn up the volume to hear a strange garbled and quite disturbing voice coming from the wall; a disembodied voice.

Go to the map in Spectator mode and look for a drivable tank to the left and in front of two trucks. From there, it should be next to the destroyed building you are looking for. Make sure the truck behind the tank is in front of a destroyed Flak cannon; the building is to the left according to the direction of the tank. After finding the building, notice that the walls are divided into squares or segments. Also note that the correct building is connected to a series of buildings. Line up the tank exactly with the square segment it is next to on the building. Then, look carefully at the shadows and notice how they fade out the walls. If you look carefully enough looking at the whole wall square you can see a chicken with its wings in the air with big bulging eyes. Two segments over you should see a fat pig standing up and smiling.

At the bottom of the two story tin building, on the Marine's spawn side, is a jail cell with a dead tortured Russian soldier in it. Coming from the door in the cell, you can occasionally hear a Japanese person torturing another soldier.

This trick works best in multiplayer mod. You must be on the side with the hospital chair and down yourself in the doorway closest to the door that separates the two sides unless the power is on (not by the Jugger-Nog) for this to work. In other words, no one can revive you. In the next round, crouch in the corner of the cabinet and look at the corner in the back (not the corner by the window), then stand and press [Jump] again. If done correctly, you should not jump. If you jump, crouch again. Make sure your crosshair is on the corner of the cabinet and on the wall. Keep trying until you do not jump. After that happens, turn around and look at the doorway you downed yourself at. All the zombies will go to where you downed yourself. An easy way to do this is in round 1 so you can get used to getting back in this position. After round 5, at the end of each round, make a few crawlers to collect ammo, go to the box, etc. If you have a lot of them, kill some to get more points. Note: Try killing the fast ones to get more time. Make sure no one else is close to you, otherwise the zombies will go after them. If the zombies get them, and are close enough to you, they will then also get you.

This trick requires two players. After a few waves pass, open the doors that lead to the Thompson and go up the stairs that take you to the power switch. Open the door that leads to the teleporter, then go to the right and have one player go to the wall on the left. There is a hole on the floor. Have a player remain as close as possible facing the window and look at the door every once in awhile. Note: You must be squatting down. Have the other player go in the hole and stay close to the wall near the other player. The zombies will go in but they will not get near you. When all the zombies are there, move slightly forward and they will start to approach. Shoot some and move back to keep them away.