Kill at least one enemy with each weapon available in the game

Kill 100 enemies using revolvers.

Kill 50 humans with pneumatic weapons.

Kill 15 human enemies with Headshots from at least 30 meters' distance.

Knock 30 human enemies out in close combat.

Kill 100 enemies with assault rifles.

Kill 20 lurkers.

Kill Adria.

Kill Urzael.

Raise the Mystic to level 12.

Escape the chasing Nazis on the REICH level without being caught once.

Complete training sequence.