Across all playthroughs, discovered all possible endings

Main character achieved level 20 as a warrior

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

Fully upgraded to the maximum number of Plasmid Slots.

Gained access to Lamb's stronghold.

Fully upgraded one Plasmid to the Level 3 version.

Gathered 600 ADAM with Little Sisters.

Defeated the Preacher.

Confronted Lamb's lieutenant in Pauper's Drop.

Joined forces with Sinclair in Ryan Amusements.

Hacked one of each kind of machine.

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

Found your way back into the ruins of Rapture.