Defeat the Boss of the Fifth Chamber

Open the shortcut to the Fourth Chamber

End a level with negative Quarma

End a level with positive Quarma

Kill a friend who has resurrected as a zombie.

Complete 12 consecutive Waves and escape from the Horde Map "The Bitter End".

Kill 50 Zombies in a row without missing a shot.

Complete Dead Ahead on any difficulty.

Headshot a Zombie post resurrection.

Kill 100 enemies by knocking them into pits

Hit someone with the old lady Level Interaction

Avenge Manuel

Begin the adventure for the first time