Defended yourself against Lamb's assault in the train station.

Found your way back into the ruins of Rapture.

Cover Kratos in 500 buckets of blood by killing the enemies

Kill Hades

Upgrade any weapon to the next level

Kill Poseidon

Get slimed by a charging ghost.

Knock yourself down with your own weapon.

Obtain a 100% PKE scan on a paranormal creature.

Trap a ghost.

Kill 30 enemies with the Plasma Cutter

Completed "The Superhuman Gambit"

Placed a grenade or mine while pickpocketing