Along with the regular Achievement points and Trophies there are 17 secret ones to unlock.,
Daddy’s Home (10 points or Bronze): Found your way back into the ruins of Rapture.
Protector (20 points or Bronze): Defended yourself against Lamb’s assault in the train station.
Sinclair’s Solution (20 points or Bronze): Joined forces with Sinclair in Ryan Amusements.
Confronted Grace (10 points or Bronze): Confronted Lamb’s lieutenant in Pauper’s Drop.
Defeated the Preacher (20 points or Bronze): Defeated the Preacher.
Nose for News (20 points or Bronze): Uncovered the secret of Dionysus Park.
Found Lamb’s Hideout (20 points or Bronze): Gained access to Lamb’s stronghold.
Reunion (50 points or Bronze): Reunited with your original Little Sister.
Heading to the Surface (25 points or Bronze): Headed to the surface on the side of Sinclair’s escape pod.
Escape (100 points or Gold): Escaped Rapture.
9-Irony (5 points or Bronze): Paid your respects to the founder of Rapture.
Distance Hacker (5 points or Bronze): Used the Hack Tool to hack an object at a distance.
Unbreakable (20 points or Bronze): Defended yourself against the Big Sister without dying.
Look at You, Hacker (15 points or Bronze): Killed 50 enemies using only hacked Security.
Adopted a Little Sister (5 points or Bronze): Adopted a new Little Sister for the first time.
Savior (25 points or Silver): Saved every Little Sister and spared Grace, Stanley and Gil.
Counterattack (5 points or Bronze): Killed an enemy with its own projectile.
