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

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.

Completed "Who Dares Wins"

Completed "Walking With Spirits"

Completed "This Galaxy Ain't Big Enough…"

Reached Level 30 with Good Karma

Completed "Shock Value"

Completed "Operation: Anchorage!"

Completed "The Guns of Anchorage"

Discovered 100 locations

Knife an enemy without him ever knowing you were there in Single Player or Special Ops.