There are seventeen secret achievements in Bioshock 2 you can earn for an additional 375 gamer points. Here is the full list of secret achievements you can earn in the game.
Check out my other guide if you’re looking for the full list of achievements for Bioshock 2.
9-Irony (5 points) – Paid your respects to the founder of Rapture
Adopted a Little Sister (5 points) – Adopted a new Little Sister for the first time
Confronted Grace (10 points) – Confronted Lamb’s lieutenant in Pauper’s Drop
Counterattack (5 points) – Killed an enemy with its own projectile
Daddy’s Home (10 points) – Found your way back into the ruins of Rapture
Defeated the Preacher (20 points) – Defeated the Preacher
Distance Hacker (5 points) – Used the Hack Tool to hack an object at a distance
Escape (100 points) – Escaped Rapture
Found Lamb’s Hideout (20 points) – Gained access to Lamb’s stronghold
Heading to the Surface (25 points) – Headed to the surface on the side of Sinclair’s escape pod
Look at You, Hacker (15 points) – Killed 50 enemies using only hacked Security
Nose for News (20 points) – Uncovered the secret of Dionysus Park
Protector (20 points) – Defended yourself against Lamb’s assault in the train station
Reunion (50 points) – Reunited with your original Little Sister
Savior (25 points) – Saved every Little Sister and spared Grace, Stanley and Gil
Sinclair’s Solution (20 points) – Joined forces with Sinclair in Ryan Amusements
Unbreakable (20 points) – Defended yourself against the Big Sister without dying
