You can unlock the Stage Select and Concept Missions options by completing the game under any difficulty setting.
Unlockable How to Unlock Concept Missions (downloadable content missions) Complete the game under any difficulty stting. Stage Select Complete the game under any difficulty setting.
Contributed By: WurdMan.
Unlock Chaos Mode
Unlockable How to Unlock Chaos Mode Complete Easy, Normal, and Hard Modes
Contributed By: Bendilin.
Unlock Hell Mode
Beat the game through on Hard Then Chaos Mode to Unlock this Difficulty
Unlockable How to Unlock Hell Mode Beat Chaos and Hard Modes
Contributed By: alanlott.
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