Uncover 3 main game Crypts' secrets

Enter the Temple of Life's inner chamber

Perform a Stealth Takedown from a mud-covered wall

Kill 3 enemies while they are distracted

Buy an item from a merchant

Complete a Side Mission

Gather 40 gold ore

Complete an Artifact Collection

Purchase a Skill

Perform 3 headshots in 3 seconds with the pistol

Remove the dagger from the Temple of the Moon

Completed all research on every subject in Rapture.

Decipher the Path of the Stars