Accomplish the indicated achievement to get the corresponding number of 
Gamerscore points:

  Tin Can Captain (15 points): Sink 20 enemy ships with your destroyer by using 
  torpedoes. 
  Broadside Kill (15 points): Sink an enemy ship with your cruiser in 15 
  seconds. 
  Long-range Gunnery (15 points): Destroy an enemy ship which is 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): Achieve 3 torpedo hits with the same torpedo bomber. 
  Deadly Accuracy (15 points): Cause 20 magazine explosions with dive bombers. 
  Double Whammy (15 points): Damage at least two targets in one bombing run. 
  Supply Line (5 points): Use the support manager to successfully 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 at least 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.