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