Upgrade any weapon three times.

Complete a full set of armor.

Purchase any weapon mod.

Obtain the Sprout-O-Matic gadget.

Obtain a Titanium Bolt.

Defeat a Crimson Head prototype1 using Jill.

Save Richard with a serum.

Burn up a zombie.

Defeat a zombie.

Obtain all weapons.

Defeat Mimicry Marcus for the first time only using a knife.

Defeat Cartman without damaging any stationary decoy.

Defeat 10 Vampire Kids.