Defended yourself against the Big Sister without dying.

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

Paid your respects to the founder of Rapture.

Upgraded a weapon at a Power to the People Station.

Used the Hack Tool to hack an object at a distance.

The player has defeated Atlas

The player has either Harvested or Rescued every possible Little Sister

Acquire all upgrades for all weapons

Fully upgrade five weapons

Fully upgrade four weapons

The player has taken a picture of Sander Cohen's corpse

Fully research the Nitro Splicer

The player has defeated Andrew Ryan