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.

Use the Auger force barrier to stop 150 incoming enemy shots in the single player Campaign.

Kill 50 enemies through solid matter with the Auger in the single player Campaign.

Defeat the swarm in the single player Campaign.

Kill 1000 enemies in the single player Campaign.

Collect 5 pieces of intel in the single player Campaign.

Kill 40 hybrids in the single player Campaign.

Finish the game as best friends

Complete half the game on hardest difficulty

Complete Chapter 5 on any difficulty level

Complete Chapter 4 on any difficulty level