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

Killed an enemy with its own projectile.

Reunited with your original Little Sister.

Gained access to Lamb's stronghold.

Maxed out one Research Track.

Gathered 600 ADAM with Little Sisters.

Defeated the Preacher.

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

Confronted Lamb's lieutenant in Pauper's Drop.

Researched a Splicer with the Research Camera.

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.