Completed your first non-private match.

Finished the game without using Vita-Chambers.

Got through a Gather with no damage and no one getting to the Little Sister.

Finished the game on the hardest difficulty level.

Defeated 3 Big Daddies without dying during the fight.

Kill 500 zombies

Defended yourself against the Big Sister without dying.

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

Saved every Little Sister and spared Grace, Stanley and Gil.

Dealt with every Little Sister.

Uncovered the secret of Dionysus Park.

Defeated the Preacher.

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