Perform a melee kill while you're in Overkill

Level up to Rank 5

Complete a mission (excluding New Blood) with a human partner

Make your first kill as a rookie (in Cause and Effect mission)

Replace a painting undercover

Purchase the Trigger Bomb from ThiefNet

Collect 15 clue bottles

Escape from Carmelita

Open all vaults

Track down Clockwerk

Find all the blueprints

Learn Sir Augustine of Cooper's Briefly Defy Gravity Technique