Full list of all 33 Battleship achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Completed the game on Admiral Difficulty.
Completed the game on Captain Difficulty or higher.
Found all 28 hidden pegs.
Occupied all support positions in "Overrun".
Downed 40 enemies that are stunned by the LRAD.
Downed 200 enemies with artillery support calls.
Destroyed 20 enemy ships with the USS Yukon.
Downed 40 enemies with the Alien Railgun.
Recovered 5 ships.
Downed 3 or more enemies with one shot from the Railgun.
Completed the game on any Difficulty.
Completed "End Game" on any Difficulty.
Defeated 40 enemy vessels in Ship Control gameplay.
Destroyed 20 enemy ships with the USS Missouri.
Completed "Retaliation" on any Difficulty.
Destroyed 20 enemy ships with the USS Laredo.
Downed 40 enemies with Grenades.
Downed a Thug with the pistol.
Completed "They're Back!" on any Difficulty.
Downed 40 enemies with the Shotgun.
Completed "The Big Guns" on any Difficulty.
Downed 5 enemies with one support call.
Disarmed or planted 20 charges.
Completed "Overrun" on any Difficulty.
Destroyed 10 enemy ships with the USS Chesapeake.
Downed 40 enemies with the Carbine.
Destroyed 20 enemy ships with the USS John Quincy Adams.
Completed "Construction" on any Difficulty.
Downed 40 enemies with the Pistol.
Fully outfitted a ship with the maximum number of Wild cards available.
Downed 40 enemies with the KRAW.
Completed "The Arrival" on any Difficulty.
Used your first support call.