Killed an enemy with its own projectile.

Maxed out one Research Track.

Completed your first trial in a non-private match.

Became a Big Daddy for the first time in a non-private match.

Completed your first non-private match.

Defeated 3 Big Daddies without dying during the fight.

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

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.

Collected all Treasures.