Achieve the following hidden objectives by performing the corresponding tasks in the specified missions:

American missions
HIDDEN OBJECTIVE - TASK
1. Battle Of The Eastern Solomons - Sink all Japanese ships.
2. Battle Of Cape Esperance - Destroy the southern escaping convoy.
3. Battle Of Santa Cruz - Sink a battleship from the Vanguard Force and destroy all enemy ships on veteran difficulty.
4. Defense Of Henderson Field - Take out the destroyers Ikachuki and Inazuma.
5. First Battle Of Guadalcanal - Sink the Heiei in less than five minutes.
6. Second Battle Of Guadalcanal - Destroy all three seaplanes stationed at Savo Island.
7. Invasion Of Tarawa - Destroy all anti-air guns.
8. Battle Of The Philippine Sea - Win without losing the USS Albacore.
9. Divine Winds Of Leyte - Bomb all fortresses into the ground.
10. Battle Of Cape England - Destroy the Japanese transport convoy.
11. Sub On Patrol - Steal the Japanese recon plane.
12. Air Raid Against Indochina - Sink the convoy before it escapes and destroy the train with the exploding refinery.
13. Invading Iwo Jima - Protect all transport ships.
14. Battle Of Okinawa - Prevent the Yamato from reaching the shore.

Japanese missions
HIDDEN OBJECTIVE - TASK
1. Attack On Pearl Harbor - Bomb the Neosho while it passes California and destroy both Henry's ship and Donald's plane in Pearl Harbor.
2. Destruction Of Z Force - Take out the Repulse before reinforcements arrive.
3. Battle Of Java Sea - Prevent all attacks on transports by sinking the destroyer Electra.
4. Saving The Soho - Take out the radar station.
5. Invading Of Port Moresby - Keep hold of your bases.
6. Hunt For The USS Hornet - Take out all transport ships in the convoy.
7. Invasion Of Midway - Disable the airfields by destroying all fuel tanks.
8. Defense Of Guadalcanal - Do not allow any of the landing ships to reach shore.
9. Solomons Skirmish - Keep all Japanese battleships functional.
10. Attack On Sydney's Harbour - Find the lost Japanese recon plane marked on the map as O-804.
11. Seizing The Fijis - Spot the minefield with a recon plane.
12. Meet The Germans - Sink one ship with both submarines and land in the sea with a flying boat or a seaplane.
13. The Road To Hawaii - Destroy the radio station and its defenses on the island to the west.
14. Invasion Of Hawaii - Send a recon plane to spy enemy submarines before the attack.

Unlock the following units by performing the corresponding tasks:

American missions
UNITS - HOW TO UNLOCK
Allen M. Sumner Class Destroyer - Beat the "Battle Of Santa Cruz" mission.
Anti-Submarine Warfare Fletcher Class Destroyer - Beat the "Battle Of Cape Engano" mission.
Atlanta Class Anti-Aircraft Cruiser - Beat the "Battle Of Cape Esperance" mission.
B-29 SuperFortress Heavy Bomber - Beat the "Air Raid Against Indochina" mission.
Gato Class Attack Submarine - Beat the "Defense Of Henderson Airfield" mission.
Iowa Class Battleship - Earn a gold medal on the "First Battle Of Guadalcanal" mission.
TBM-3 General Motors Avenger - Earn a gold medal on the "Battle Of Okinawa" mission.

Japanese missions
UNITS - HOW TO UNLOCK
Akizuki Class Anti-Air Destroyer - Earn a silver medal on the "Saving The Shoho" mission.
H8K Emily Flying Boat - Earn a silver medal on the "Destruction Of Z Force" mission.
I-400 Submarine - Earn a silver medal on the "Hunt For The USS Hornet" mission.
J7W Shinden Fighter Plane - Earn a silver medal on the "Invading Of Port Moresby" mission.
Betty with Ohka Suicide Rocket Plane - Earn a gold medal on the "Invasion Of Hawaii" mission.
Shimikazi Advanced Torpedo Destroyer - Earn a silver medal on the "Solomons Skirmish" mission.
Tone Class Heavy Cruiser - Earn a silver medal on the "Battle Of Java Sea" mission.
Type B Submarine with Kaiten Manned Torpedoes - Earn a silver medal on the "Attack On Sydney's Harbour" mission.
Yamato Class Battleship - Earn a gold medal on the "Invasion Of Midway" mission.

ACHIEVEMENT - HOW TO UNLOCK
Tin Can Captain (15 points) - Sink 20 enemy ships with your destroyer using torpedoes.
Broadside Kill (15 points) - Sink an enemy ship with your cruiser in under 15 seconds.
Long-range Gunnery (15 points) - Destroy an enemy ship over 2800 meters away using a battleship.
Flat-top Commander (15 points) - Send 50 planes into the air with the support manager.
Death from Below (15 points) - Sink an enemy battleship with your submarine.
Fighter Ace (15 points) - Destroy 5 enemy planes in less than 30 seconds without losing your fighter plane.
Hat-trick (15 points) - Get 3 torpedo hits with the same torpedo bomber.
Deadly Accuracy (15 points) - Cause 20 magazine explosions with dive bombers.
Double Whammy (15 points) - Damage two targets in one bombing run.
Supply Line (5 points) - Use the support manager to send up a plane or request a ship.
Advantage (5 points) - Use the naval supply manager to activate a naval supply.
Banzaaai! (15 points) - Crash into an enemy ship while flying over 600km/h.
Surprise Attack (10 points) - Strafe all parked planes in Pearl Harbor.
Turning Point (10 points) - Sink all US Carriers in the Invasion of Midway.
Preventive Strike (10 points) - Sink the US Battleship before the reinforcements arrive in Solomons' Skirmish.
Under Cover of Darkness (10 points) - Win a night battle.
Queen Sacrifice (10 points) - Sink the abandoned Hornet in the Battle of Santa Cruz.
Marianas Turkey Shoot (10 points) - Destroy 20 enemy planes in the Battle of the Philippine Sea.
Zero Damage (10 points) - None of the kamikaze planes should hit any of your ships during Divine Winds of Leyte.
Take No Prisoners (50 points) - Destroy every hostile unit in Battle of Santa Cruz on Veteran difficulty.
National Veteran (20 points) - Participate in 25 online sessions as the US.
National Hero (50 points) - Participate in 100 online sessions as the US.
Fist of the Empire (20 points) - Participate in 25 online sessions as the Japanese.
Wrath of the Empire (50 points) - Participate in 100 online sessions as the Japanese.
War Room (10 points) - Host and play through 50 online sessions.
Conqueror (20 points) - Win 50 online sessions.
Armchair Admiral (10 points) - Win an online Island Capture session using the map screen only to attack units or emplacements.
Frontline Admiral (10 points) - Win an online Island Capture session without switching to the map screen.
Rising Sun (60 points) - Complete the Japanese Campaign on Veteran difficulty.
Stars and Stripes (60 points) - Complete the US Campaign on Veteran difficulty.
Submarine Hunter-killer (20 points) - Destroy an enemy submarine with a submarine by using torpedoes.
Overwhelming Force (25 points) - Complete the Japanese Campaign on Any difficulty.
Shock and Awe (25 points) - Complete the US Campaign on Any difficulty.
Island Hopping (30 points) - Win every Island Capture map at least once.
Victory Rush (30 points) - Win every Competitive, Duel, Escort and Siege map at least once.
Fleet Commander (50 points) - Reach the rank of Lieutenant.
Head of the Fleet (100 points) - Reach the rank of Fleet Admiral.
Disembarkation (5 points) - Capture a base by using landing ships.
Airborne Invasion (10 points) - Capture a base by using paratroopers.
Don't Mess with the Big Boys (10 points) - Sink a hostile carrier with your battleship.
Repair for your Life (10 points) - Survive being fatally damaged by retaining minimal health.
Against the Odds (10 points) - Sink a stronger enemy ship than your ship.
We're not finished yet! (20 points) - Sink an enemy ship while your ship is under 3% health.
Pure Gold (10 points) - Get your first gold medal.
Hero of Midway (10 points) - Played Battlestations Midway.
Past Memories (10 points) - Destroy both Henry's ship and Donald's plane in Pearl Harbor.
I've Changed My Mind (10 points) - Land manually on an airfield or carrier with a kamikaze squadron.
Underwater Hideout (10 points) - Discover the secret underwater cave of Sydney Harbor.
Trainkiller (10 points) - Destroy the train with the exploding refinery in Air raid Against Indochina.
Flying Fish (5 points) - Land on the water with a seaplane or flying boat.
The Protector (20 points) - Protect both carriers as the Japanese in Escort mode on Map 12.
Northern Waves (30 points) - Win a large map sized Island Capture mission on Map 14.
Battleship Shutout (30 points) - Win 3 straight rounds without loss as the Japanese, in a battleship Duel on Map 13.
Siege of Midway (20 points) - Win a Siege mission on Map 11.
The Survivalist (50 points) - Win a Competitive match without losing your submarine on Map 12.

"Carrier Battle Map Pack" achievements
ACHIEVEMENT - HOW TO UNLOCK
The Protector (20 points) - Protect both carriers as the Japanese in Escort mode on Map 12.
Northern Waves (30 points) - Win a large map sized Island Capture mission on Map 14.
Battleship Shutout (30 points) - Win 3 straight rounds without loss as the Japanese, in a battleship Duel on Map 13.
Siege of Midway (20 points) - Win a Siege mission on Map 11.
The Survivalist (50 points) - Win a Competitive match without losing your submarine on Map 12.