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