Killed an enemy with its own projectile.

Escaped Rapture.

Headed to the surface on the side of Sinclair's escape pod.

Reunited with your original Little Sister.

Gained access to Lamb's stronghold.

Killed 50 enemies using only hacked Security.

Uncovered the secret of Dionysus Park.

Defeated the Preacher.

Spent 2000 dollars at Vending Machines.

Defeated 3 Big Daddies without dying during the fight.

Joined forces with Sinclair in Ryan Amusements.

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

Adopted a new Little Sister for the very first time.