Beat the game on any difficulty. After the credits roll Challenge Modes are unlocked.
Unlockable How to Unlock Boneyard Challenges. Beat the game. Points Count Beat the game.
Contributed By: aheedthegreat.
Femme Fatale (Ultra Hard) difficulty
Unlockable How to Unlock Femme Fatale (Ultra Hard) difficulty Beat the game on Fixer (Hard) difficulty
Contributed By: Viogamer.
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