BioShock 2 offers a wide array of achievements and trophies for players to unlock. These range from story-related achievements to those requiring specific combat feats, collecting all audio diaries, or fully upgrading weapons and Plasmids. Some notable achievements include 'Savior' (rescuing all Little Sisters), 'Master Protector' (successfully completing all Little Sister gatherings), 'Historian' (collecting all audio diaries), and 'Fully Upgraded' (fully upgrading all weapons and Plasmids). For completionists, it's recommended to play through the game at least twice: once for a 'Good' ending playthrough focusing on rescues and collectibles, and another for a 'Bad' ending or a speedrun. Many achievements can be earned naturally, but some require specific planning or multiple playthroughs.
