The player has taken at least one Research Photo of a Splicer

The player has purchased one slot in any Plasmid or Tonic track

The player has defeated the crazed Dr. Steinman

The player has successfully hacked a turret

The player has performed at least one successful hack

The player has shocked an enemy in the water

Complete all chapters on Hard difficulty setting

Complete all chapters on Easy difficulty setting

Defeat 50 enemies with THE DENTIST

Defeat 30 enemies with the TEETHGRINDER

Perform 5 Head Shots in a row with any weapon

Perform a Head Shot right after a Leg Mutilation when the enemy is flying back in the air