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.
Killed 30 enemies using only Traps.
Defended yourself against the Big Sister without dying.
Joined forces with Sinclair in Ryan Amusements.
Confronted Lamb’s lieutenant in Pauper’s Drop.
Bought one Plasmid or Tonic Slot at a Gatherer's Garden.
Got through a Gather with no damage and no one getting to the Little Sister.
Headed to the surface on the side of Sinclair's escape pod.
Escaped Rapture.
Finished the game without using Vita-Chambers.
Paid your respects to the founder of Rapture.
Saved every Little Sister and spared Grace, Stanley and Gil.
Found every Power to the People weapon upgrade in the game.
Finished the game on the hardest difficulty level.
Completed all research on every subject in Rapture.
Achieved Rank 40.
Achieved Rank 30.
Achieved Rank 20.
Saved your first Little Sister in a non-private match.
Found 100 audio diaries.
Found or purchased all 11 basic Plasmid types.
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.
Killed an enemy with its own projectile.
Uncovered the secret of Dionysus Park.
Fully upgraded one Plasmid to the Level 3 version.
Gathered 600 ADAM with Little Sisters.
Killed 50 enemies using only hacked Security.
Defeated the Preacher.
Hacked 30 machines at a distance with the Hack Tool.
Spent 2000 dollars at Vending Machines.
Achieved Rank 10.
Became a Big Daddy for the first time in a non-private match.
Played at least one non-private match on each multiplayer map.
Completed your first trial 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.
Maxed out one Research Track.
Installed the third upgrade to a weapon.
Defeated 3 Big Daddies without dying during the fight.
Researched a Splicer with the Research Camera.
Adopted a new Little Sister for the first time.
Hacked one of each kind of machine.
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.
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