You can gain as much as 50,000 XP in an online match by doing the following. Get twelve people into a lobby and kick six of them out. Make sure the host of the lobby temporarily has a bad connection so that you will become the host. Find a Search And Destroy game. Once in the lobby, find six people to join. Make the connection good again and start the match. Choose a class that has the riot shield and use the One Man Army Perk it you have it unlocked. When the match begins, get another player to fire at you while you hold the riot shield. You will get 500 XP every few seconds.
Look from the middle of the map at the cranes, then to the left side of the map. Go that side's back left corner. You will see broken scaffolding. Sprint from before the ledge and jump to the left outside yellow railing. Note: The railing is vertical. This is a hidden ladder. Climb up this railing/ladder to the top of the scaffolding, then walk to the right of the scaffolding along the ledge of the building. You will eventually reach another scaffolding. Climb onto this scaffolding. Walk to the top. Look towards the building and climb onto the higher ledge. Follow that ledge going left. Keep going forward and you will reach the roof. This is a great sniper position. You may want to bring a Tactical Insertion because other players may discover you on your way to the top, or while you are up there, and lob grenades.
To easily complete the "O Cristo Redentor" Special Ops mission under the Hardened or Veteran difficulty setting, do the following. For every ten defeated militia, two dogs will attack you. Typically one will appear from the high ground behind the fence, and another from the west. For every ten defeated men, run to the white truck by your starting point. Jumping on top of this truck will trigger the dogs to freeze wherever they stand. Lure them by standing on the ground. When you hear their barking get near, leap onto the truck when they are in the vicinity. Now that they are frozen, you can pick them off wherever they stand.
At one of the ends of the map is a short length pipe sticking out. If you climb in it, you cannot be killed by kill streak explosions (for example, air strikes, Predator missiles, AC-130, etc.). The only time it can kill you is if it goes directly into the pipe.
Play multi-player mode and hold any sniper rifle with its primary scope. Start running in any direction, as long as the sunlight shines on the back of it. You will see a green frowning face with its tongue sticking out, like the one you can receive in your accolades.
To unlock the Museum bonus mission, beat the game. It will become available under the Single-Player missions. In this mission, there is a red bell on a desk by the starting room labeled "Don't Press". Press it and you will begin to be ambushed every character in the game. Good luck.
To unlock additional Custom Class slots, you must first unlock Prestige mode by reaching level 70 in Multiplayer mode. Unlock the following Custom Class slots by reaching the corresponding prestige levels:
CLASS SLOT - PRESTIGE LEVEL 6th Custom Class slot - First Prestige 7th Custom Class slot - Second Prestige 8th Custom Class slot - Fourth Prestige 9th Custom Class slot - Seventh Prestige 10th Custom Class slot - Tenth Prestige
To skip "No Russian" on Veteran difficulty, you must complete it on any lower difficulty level. Then, play it on Veteran. When the level starts, choose to skip it. The level will be marked as completed.
Choose Campaign mode and play "The Hornet's Nest" in Act 2. Go to the market and look for a soccer ball on a table to the left. Walk a short distance ahead to find a television set. Break its screen to find an Infinity Ward teddy bear inside.
Complete the "No Russian" mission under any difficulty setting. Select it again from the mission menu, and choose the Veteran difficulty setting. After the level starts, pause game play. You will get an option to skip the mission due to its content. Choose to do so, and you will be given credit for completing it under the Veteran difficulty setting.
Search the following locations to find the hidden enemy Intel laptops:
Act 1: S.S.D.D -The Intel is under the watch tower, straight across from the entrance to the obstacle course.
Act 1: Team Player -The Intel is in a classroom. Someone will announce "I think I saw one go in that classroom", and your team will go in. It is on the right wall as you enter, on a desk by the barrels. -As you exit the school, it is on a crate directly outside, next to a taxi.
Act 1: Cliffhanger -Directly in front of you when Soap tells you to go ahead alone is a guard tower. Go up the ladder to find the Intel on the catwalk. -When you are about to enter the building with Soap, go to the previous building in the alley where the Jet is inside the hanger. Break out the window to find the Intel inside. -During the snowmobile sequence, when you are approximately 1,850m from the finish, stop. Look for a small wooden fence surrounding some trees in the middle of the path in front of you, and a small wooden building up a hill to the right. The Intel is on the ground inside the fenced area with trees. Just run over the Intel to pick it up.
Act 1: Takedown -Using the map, go towards the south-west corner when you enter the favela. You should find a motorcycle leaning against a building. In front of it, there is a building with an angled wall and a large window in the wall. Go through the door to the right of that window to find the Intel inside. -When you go through the alley and see the building with the ladder on the wall, go up it and through the door. The Intel is on a table inside. -Directly across from the previous Intel is a building with a small set of wooden stairs. -There are a few guys inside you have to kill. The Intel is inside the building on a nightstand next to the bed. -Towards the end of the chase, off an alley, go in the building on the right side of the path. Go downstairs to find the Intel between two beds.
Act 2: Wolverines! -The Intel is on the counter in the gas station after you go through the alley. -The Intel is inside CRB Financial (across from Nate's Restaurant), near the front door, under a sign labeled "Online Banking". -The Intel is on a table inside Taco To Go. Enter the building through the blown up corner. The Intel is inside a dumpster (in a small brick enclosure) on the east side of Burger -Town. It is visible from the Burger Town roof ladder.
Act 2: The Hornet's Nest -Near the start, after you move forward from the first building, go inside the house to the right of where Soap stops in the road (there is a blue car in the garage). Go past the blue car and into the kitchen to find the Intel on the table. -After clearing the small lot (has a bunch of appliances and cars), instead of going right up the stairs between buildings, go left around the three-story house (floors are colored red, yellow, red), and look in the little hut attached to its side to find the Intel on some barrels. -As you move up the sloped street, there is a blue car on the right side of the street. In the building on that side is the Intel up on the second floor on the table. -When you enter the last open lot and are supposed to go up on the roof, turn to the right, and look in the window behind the goal fence to find the Intel inside a window.
Act 2: Exodus -In the apartment office, near where the enemies are first repelling in from a chopper. It has red walls and blue curtains inside. The Intel is on the desk. -In the right-side building of the structure that forms an arch over the road (has toll booths), on a desk directly to the right as you enter. -After you cross the bridge, go into the second house on the right side of the street. Enter from the front door, then go to your right and up the stairs. The Intel is on a yellow couch above those stairs.
Act 2: The Only Easy Day... Was Yesterday -In the room before you go back outside (shortly after breaching), the Intel is on one of the metal racks against the wall. -After executing "Plan B", in the room Soap goes into on the right, the Intel is on a metal rack inside the door. -After clearing outside, when the team starts going up the stairs, enter the room to the right (you were probably in this building before when you were told to take cover), and look under the stairs on some wooden palettes to find the Intel.
Act 2: The Gulag A-s your team moves towards the arch with the red light, go to the stone stairs before it, and look inside the room on the far wall to find the Intel on some filing cabinets. -The Intel is on a desk behind the large wall of monitors you encounter on your way through. -After you get the riot shield and leave the room where you got it, turn left, and go down the hallway. In the first open cell on the right-side wall is the Intel on a desk. Once you find the person you have been looking for, turn to your left to find the Intel on the desk.
Act 2: Of Their Own Accord -Inside the elevator that keeps trying to close (in the hallway after you enter the building), the Intel is to the right of the body sitting inside. -In the room with a balcony (out on the balcony is a missile launcher), go to your left as you enter the room, and enter the door straight ahead (near the portrait of Franklin Pierce) to find the Intel on a table down a small hallway.
Act 3: Contingency -When you reach the three-man patrol standing near the fence, kill them, and go over to where they were. The Intel is about ten feet south on a crate. -The building labeled "33" along the angled south-west fence contains the Intel on a metal desk inside the northern door. -Just north of building "33", locate the stairs leading to a helipad (has blue lights on the corners) to find the Intel in the north-west corner.
Act 3: Whiskey Hotel -When told to go left to the building, inside that building after the next door has been opened, the Intel is in the hallway on a couch to the left. -After you go up the first stairs towards the roof, the Intel is to your right on a desk. This should be about the time when the you see the flares get lit. Act 3: Loose Ends -Before you enter the house, go behind it, and locate the small boat hanger along the shore. The Intel is on a crate outside of it. -In the locked room on the top floor of the house, the Intel is on a desk in front of the door. -In the closest locked room in the basement, go into the arms room to the left. The Intel is straight across from the wall of weapons on a crate.
Act 3: The Enemy of My Enemy -The Intel is to your right when you begin the mission, in the front of the plane. -After sliding out of the plane hull and move across the street and up the hill, look for the plane pointing towards the road. The Intel is inside, near the cockpit.
Act 3: Just Like Old Times -As you enter the tunnels, go left as instructed. After the patrol passes, kill the guard standing at the monitor, and go straight across to find the Intel on a crate just to the right of the cave entrance. -The Intel is to the left on a desk right before you go outside from the tunnels. -After going across the ridge, the Intel is in an alcove, on a crate. -The Intel is on the desk with soda cans after you breach the room, near where your ally is working on the computer.
Endgame The Intel is at the start of the mission, before you board the vehicle.
During s multi-player game or Spec Ops missions, you can revive yourself by holding F if you have been hurt and are about to bleed out. It does not always happen, but is worth a try. The glitch also sometimes will give you a new weapon when you get revived.
ACHIEVEMENT - HOW TO UNLOCK Back in the Saddle - Help train the local militia. Black Diamond - Complete 'Cliffhanger' on Veteran Difficulty. Blackjack - Earn 21 stars in Special Ops. Charlie On Our Six - Earn 8 stars in Special Ops. Cold Shoulder - Infiltrate the snowy mountain side base. Colonel Sanderson - Kill 7 chickens in less than 10 seconds in 'The Hornet's Nest'. Danger Close - Get picked for Shepherd's elite squad. Desperado - Kill 5 consecutive enemies using 5 different weapons or attachments in Single-Player or Special Ops. Desperate Times - Execute the plan to help the Americans. Downed but Not Out - Kill 4 enemies in a row while downed in Special Ops. Drive By - Kill 20 enemies in a row while driving a vehicle in Single-Player or Special Ops. Ends Justify the Means - Complete 'Contingency' on Veteran Difficulty. First Day of School - Complete 'S.S.D.D.' and 'Team Player' on Veteran Difficulty. For the Record - Complete the Single-Player campaign on any difficulty. Ghost - Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard. Gold Star - Earn 1 star in Special Ops. Homecoming - Complete 'Of Their Own Accord', 'Second Sun', and 'Whiskey Hotel' on Veteran Difficulty. Honor Roll - Earn at least 1 star in each Special Op mission. Hotel Bravo - Earn 4 stars in Special Ops. I'm the Juggernaut... - Kill a Juggernaut in Special Ops. It Goes to Eleven - Earn at least 1 star in 11 different Special Op missions. Knock-knock - Kill 4 enemies with 4 shots during a slow-mo breach in Single-Player or Special Ops. Leave No Stone Unturned - Collect 45 enemy intel items. Look Ma Two Hands - Kill 10 enemies in a row using akimbo weapons in Single-Player or Special Ops. No Rest For the Wary - Knife an enemy without him ever knowing you were there in Single-Player or Special Ops. Off the Grid - Complete 'Just Like Old Times' and 'Endgame' on Veteran Difficulty. Operational Asset - Earn all 3 stars in at least 5 different Special Op missions. Operative - Earn all 3 stars in at least 10 different Special Op missions. Out of the Frying Pan... - Complete the mission in the airplane graveyard. Pit Boss - Run The Pit in 'S.S.D.D.' and finish with a final time under 30 seconds. Prisoner #627 - Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' on Veteran Difficulty. Professional - Earn all 3 stars in at least 15 different Special Op missions. Queen takes Rook - Complete 'Loose Ends' and 'The Enemy of My Enemy' on Veteran Difficulty. Red Dawn - Complete 'Wolverines!' and 'Exodus' on Veteran Difficulty. Royale with Cheese - Defend Burger Town. Soap on a Rope - Storm the gulag. Some Like it Hot - Kill 6 enemies in a row using a thermal weapon in Single-Player or Special Ops. Specialist - Earn 30 stars in Special Ops. Star 69 - Earn 69 stars in Special Ops. Tag 'em and bag 'em - Find Rojas in the Favelas. Ten plus foot-mobiles - Kill at least 10 enemies with one Predator missile in Single-Player or Special Ops. The Harder They Fall - Kill 2 rappelling enemies in a row before they land on their feet in Single-Player or Special Ops. The Pawn - Assault Makarov's safe house. The Price of War - Complete the single player campaign on Hardened or Veteran Difficulty. The Road Less Traveled - Collect 22 enemy intel items. Three-some - Kill at least 3 enemies with a single shot from a grenade launcher in Single-Player or Special Ops. Turistas - Complete 'Takedown' and 'The Hornet's Nest' on Veteran Difficulty. Two Birds with One Stone - Kill 2 enemies with a single bullet in Single-Player or Special Ops. Unnecessary Roughness - Use a riot shield to beat down an enemy in Single-Player or Special Ops. Whiskey Hotel - Take back Whiskey Hotel.
You will usually have multiple allied team members on your side throughout the game. The teammates that are invincible are Dunn, Ghost, Foley, Makarov, MacTavish, and Price. Always let them lead the way during battle. While your other teammates can die, they are replaced by reinforcements. Although it is slower, it is much safer to let your teammates lead the way, especially when you are low on health and need to heal.
While online, the first time before you prestige is basically pointless. Any progress you made with any primary, secondary, or any other weapon or kill streak will be reset. However, after you prestige the first time, the kills and headshots you get with your primary and secondary weapons (except the riot shield) will be saved via the Master and Veteran challenges under each gun. After prestiging once, you will also get the Prestige challenges, which is a separate set of challenges like Basic Training, most of which will remain if you prestige again. This tip will help not wasting hours maxing out a gun the first time to get nothing and only to learn that you have to do it again.
To activate the following cheats, you will need to edit a game file; create a back of the file before proceeding. Use a text editor to edit the "config.cfg" file in the "players " directory in the game folder. Add the following line to the end of the file:
seta thereisacow "1337"
You can now further modify the file by binding any of the following cheat codes to an unused key. For example, adding the following line will bind the "God mode" cheat to the "U" key:
bind u "god"
Save the "config.cfg" file, then Right Click it, select "Properties", and set it to "Read Only". Begin the game, then start a new level by selecting "Mission Selection" or starting a new game. To activate the following cheats, type the corresponding codes during gameplay:
CHEAT FUNCTION - CHEAT CODE God mode - god Extra ammunition - give ammo Ignored by enemies - notarget No clipping mode - noclip
Unlock the following Professional perks by performing the corresponding tasks:
PERK - HOW TO UNLOCK Bling Pro - Get 200 kills using a weapon that has two attachments. This will allow you to use two primary weapon attachments and two secondary weapon attachments. Cold-Blooded Pro - Destroy 40 enemy Killstreak rewards with the Cold-Blooded perk. This allows you to be undetectable by UAV, air support, sentries, and thermal imaging. It also removes the red crosshair or name when you are targeted. Commando Pro - Get 20 melee kills with the Commando perk. This will increase melee distance and you will not take damage when falling. Danger Close Pro - Get 100 kills with explosives with the Danger Close perk. This will increase explosive weapon damage and extra air support damage. Hardline Pro - Get 40 Killstreaks with the Hardline perk. This changes Killstreak rewards to require one less kill and Deathstreak rewards to require one less death. Lightweight Pro - Run 30 Miles with the Lightweight perk. This will make you move faster and quickly aim after sprinting. Marathon Pro - Run 26 Miles with the Marathon perk. This will give you unlimited sprint and allow you to climb obstacles faster. Ninja Pro - Get 50 close range kills with the Ninja perk. This will make you invisible to heartbeat sensors and silent footsteps. Scavenger Pro - Resupply 100 times with the Scavenger perk. This will allow you to resupply from dead enemies and get extra magazines. Scrambler Pro - Get 50 close range kills with the Scrambler perk. This will jam enemy radar nearby and delay enemy claymore explosions. Sitrep Pro - Destroy 120 detected explosives or tactical insertions with the Sitrep perk. This will allow you to detect enemy explosives, tactical insertions, and loud enemy footsteps. Sleight Of Hand Pro - Get 120 kills with the Sleight Of Hand perk. This will allow you to reload and aim faster. Steady Aim Pro - Get 80 hip fire kills with the Steady Aim perk. This will increase your hip fire accuracy and allow you to hold your breath longer. Stopping Power Pro - Get 300 Kills with the Stopping Power perk. This will increase damage given to enemies and enemy vehicles.
When the mission begins, run forward until you see the crosses or about four or five seconds in. Go to the right side against the fence and get prone. You must do this quickly so the guards do not see that you are advancing toward your beginning position. Remain prone until four guards pass by. You can crawl to a better position to view the advancing guards if desired. You can get up and proceed the right after the fourth guard passes, but stay along the fence. After that, run and go under a pipeline. If you stop and look to the left where the pipeline goes, you will see a few guards; just ignore them. Move slowly and continue to the right. You will soon encounter a guard and a dog that will come up the path to the left. If you run, then you will not see the guard. There will be another path to the left with two guards on the far side of it. Ignore this path and continue a few more steps to get beside a tree in the center of your current path. From this tree position, you will be able to snipe those two guards. Before rushing onward, make sure to take out the guard and his dog in a small clearing to the left. You must advance slightly along the fence for a clear shot. After that, you can now continue past the two guards you just sniped. Get prone a few steps ahead of them. There will be a small clearing. A patrol of three guards and two dogs will pass by. Slowly follow after the last guard, but make sure you keep your distance or risk them seeing you. After a short distance down the path, there will be one guard and a dog stopped just past the pipeline, but on the path. Wait for them to leave before moving ahead. After a couple more steps, get prone and wait for another guard and his dog to leave as well, but stay close to the pipeline. There will be a guard walking to your left as well going toward where you came from. Once those guards leave the area, crouch down and sneak up the bank of snow and go underneath the large pipeline. Once you move ahead enough following the pipeline, you should see two guards at the top of the hill in front of you, just after the pipeline turns to your right. Quickly snipe them and move up the hill to their position. Once on top of this hill you will see your green smoke and can quickly slide down the other side to complete the mission.