Full list of all 55 Battlestations: Pacific achievements worth 1,150 gamerscore.
The base game contains 50 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 150 Gamerscore.
Protect both carriers as the Japanese in Escort mode on Map 12.
Win a large map sized Island Capture mission on Map 14.
Win 3 straight rounds without loss as the Japanese, in a battleship Duel on Map 13.
Win a Siege mission on Map 11.
Win a Competitive match without losing your submarine on Map 12.