Here is the full list of all 36 Damage Inc Pacific Squadron WWII achievements.
Complete a Mission in Campaign mode (Singleplayer or Co-Op).
Sucessfully bomb a target in Campaign mode (Singleplayer or Co-Op).
Sucessfully torpedo a target in Campaign mode (Singleplayer or Co-Op).
Sucessfully divebomb a target in Campaign mode (Singleplayer or Co-Op).
Destroy 50 enemies in Campaign mode (Singleplayer or Co-Op).
Destroy 250 enemies in Campaign mode (Singleplayer or Co-Op).
Unlock the Hellcat in Campaign mode (Singleplayer or Co-Op).
Complete the Day of Infamy mission in Campaign mode (Singleplayer or Co-Op).
Complete the Battle of Midway mission in Campaign mode (Singleplayer or Co-Op).
Complete the Bloody Tarawa mission in Campaign mode (Singleplayer or Co-Op).
Complete the End of the Kido Butai mission in Campaign mode (Singleplayer or Co-Op).
Complete Campaign mode on Easy Difficulty or higher (Singleplayer or Co-Op).
Destroy an enemy aircraft that has damaged a team mate in Co-op Campaign mode.
Destroy an enemy in any match in Multiplayer mode.
Win an Elimination match in Multiplayer mode.
Win a Dogfight match in Multiplayer mode.
Win a Team Dogfight match in Multiplayer mode.
Win a Scratch One Flattop match in Multiplayer mode.
Sink 25 ships (Singleplayer or Co-Op).
Destroy 500 enemies (Singleplayer or Co-Op).
Destroy an enemy plane with rockets (Singleplayer or Co-Op).
Complete Campaign mode on Normal Difficulty or higher (Singleplayer or Co-Op).
Complete a Co-Op Campaign mission as a client.
Complete a Co-Op Campaign mission as a host with one or more team mates.
Destroy 5 enemies without dying in a single match in Multiplayer mode.
Win 5 Survivor matches in Multiplayer mode.
Win 5 Dogfight matches in Multiplayer mode.
Win 5 Team Dogfight matches in Multiplayer mode.
Win 5 Scratch One Flattop matches in Multiplayer mode.
Sink the Musashi in Campaign mode (Singleplayer or Co-Op).
Complete Campaign mode on Hard Difficulty (Singleplayer or Co-Op).
Destroy 10 enemies without dying in a single match in Multiplayer mode.