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