Killed an enemy with its own projectile.

Found your way back into the ruins of Rapture.

The player has become a Big Daddy

Fully upgrade five weapons

The player has broken Fontaine's mind control

Fully research the Nitro Splicer

Fully research the Rosie

The player has purchased every slot in one of the Plasmid or Tonic tracks

Fully research the Bouncer

Fully research the Houdini Splicer

The player has fully researched the Spider Splicer

The player has restored the forests of Arcadia

The player has fully researched the Thuggish Splicer