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 50 enemies using only hacked Security.
Defeated the Preacher.
Uncovered the secret of Dionysus Park.
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.
Bought one Plasmid or Tonic Slot at a Gatherer's Garden.
Fully upgraded to the maximum number of Plasmid Slots.
Installed the third upgrade to a weapon.
Hacked 30 machines at a distance with the Hack Tool.
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.
Spent 2000 dollars at Vending Machines.
Dealt with every Little Sister.
Saved every Little Sister and spared Grace, Stanley and Gil.
Finished the game without using Vita-Chambers.
Confronted Lamb’s lieutenant in Pauper’s Drop.
Defeated 3 Big Daddies without dying during the fight.
Researched a Splicer with the Research Camera.
Joined forces with Sinclair in Ryan Amusements.
Defended yourself against the Big Sister without dying.
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.
Find all 14 Power to the People weapon upgrades in the game.
Max out research on all 9 research subjects.
Kill an enemy with its own projectile
Get through a Gather with no damage and no one getting to the Little Sister.
Finish the game on the hardest difficulty level.
Find 100 audio diaries.
Score your first kill in a non-private match.
Complete your first non-private match.
Become a Big Daddy for the first time in a non-private match.
Take down your first Big Daddy in a non-private match.
Save your first Little Sister in a non-private match.
Complete your first trial in a non-private match.
Achieve Rank 10.
Achieve Rank 20.
Achieve Rank 30.
Achieve Rank 40.
Paid your respects to the founder of Rapture.
Win your first non-private match.
Play at least one non-private match on each multiplayer map.
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