Bought one Plasmid or Tonic Slot at a Gatherer's Garden.

Defeated 3 Big Daddies without dying during the fight.

Joined forces with Sinclair in Ryan Amusements.

Adopted a new Little Sister for the first time.

Defended yourself against Lamb's assault in the train station.

Found your way back into the ruins of Rapture.

Defeat 50 enemies with the M32 - Hammer

Defeat 20 enemies by shooting from the hip (without aiming with L1)

Defeat 70 enemies with the FAL

Finish the game in Easy Mode

Find 20 treasures

Defeat 70 enemies with the M4

Defeat 50 enemies with hand-to-hand combat