Full list of all 68 BioShock 2 achievements worth 1,400 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 18 achievements worth 400 Gamerscore.
Finished the game on the hardest difficulty level.
Got through a Gather with no damage and no one getting to the Little Sister.
Escaped Rapture.
Finished the game without using Vita-Chambers.
Headed to the surface on the side of Sinclair's escape pod.
Killed 50 enemies using only hacked Security.
Found every Power to the People weapon upgrade in the game.
Completed all research on every subject in Rapture.
Found or purchased all 11 basic Plasmid types.
Reunited with your original Little Sister.
Fully upgraded to the maximum number of Plasmid Slots.
Saved every Little Sister and spared Grace, Stanley and Gil.
Gained access to Lamb’s stronghold.
Fully upgraded one Plasmid to the Level 3 version.
Dealt with every Little Sister.
Found 100 audio diaries.
Uncovered the secret of Dionysus Park.
Bought one Plasmid or Tonic Slot at a Gatherer's Garden.
Gathered 600 ADAM with Little Sisters.
Defeated the Preacher.
Confronted Lamb’s lieutenant in Pauper’s Drop.
Hacked 30 machines at a distance with the Hack Tool.
Maxed out one Research Track.
Spent 2000 dollars at Vending Machines.
Researched a Splicer with the Research Camera.
Installed the third upgrade to a weapon.
Defeated 3 Big Daddies without dying during the fight.
Hacked one of each kind of machine.
Joined forces with Sinclair in Ryan Amusements.
Defended yourself against the Big Sister without dying.
Killed 30 enemies using only Traps.
Paid your respects to the founder of Rapture.
Killed an enemy with its own projectile.
Adopted a new Little Sister for the first time.
Upgraded a weapon at a Power to the People Station.
Defended yourself against Lamb's assault in the train station.
Used the Hack Tool to hack an object at a distance.
Found your way back into the ruins of Rapture.
Achieved Rank 10.
Played at least one non-private match on each multiplayer map.
Became a Big Daddy for the first time in a non-private match.
Saved your first Little Sister in a non-private match.
Won your first non-private match.
Completed your first trial in a non-private match.
Took down your first Big Daddy in a non-private match.
Completed your first non-private match.
Scored your first kill in a non-private match.
Achieve Rank 20.
Achieve Rank 30.
Achieve Rank 40.
Play at least one non-private match on each downloadable content map.
Win a non-private match in each of the 6 new maps.
Use Rebirth to start again!
Earn 6 stars in the Protector Trials
Earn 18 stars in the Protector Trial
Earn 36 stars in the Protector Trials
Earn an A rank in all Protector Trials
Completed all bonus Protector Trials
Collect 100% of the ADAM in a single Protector Trial
Collect 50% of the ADAM available in all Protector Trials
Reached Rapture Central Computing Operations
Reached Computer Core Access
Escaped Minerva's Den
Wrested control of the Thinker from Reed Wahl
Destroy all 10 Vacuum Bots in Minerva's Den
Got 9999 points in one game of Spitfire
Kill a Lancer Big Daddy
Resolve all the Little Sisters in Minerva's Den