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