Clean slate (5) - Kill all monsters in a level on 'Hurt Me Plenty' or higher.
Hoarder (5) - Find all items in a level.
Scout (5) - Find a secret area.
Nightmare (10) - Win a Nightmare level in single player.
Rookie (10) - Get 50 kills on Xbox Live.
Neophyte (20) - Complete any level.
Destroyer (10) - Get 100 kills on Xbox Live.
Episode four (25) - Complete Episode 4 on 'Hurt Me Plenty' or higher.
Episode one (25) - Complete Episode 1 on 'Hurt Me Plenty' or higher.
Episode three (25) - Complete Episode 3 on 'Hurt Me Plenty' or higher.
Episode two (25) - Complete Episode 2 on 'Hurt Me Plenty' or higher.
Rampage (35) - Complete all levels on ultraviolent mode.
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