Unlockables
Encyclopedia & Boss Rush (JP)
Unlockable How to Unlock Boss Rush Complete Expert Course Encyclopedia Complete Expert Course Contributed By: thesuperkillerxxx.
Unlock "Viper Phase One" Soundtrack
Once you finish the ''Training'' Mission difficulty in the game, you'll be able to choose the ''Viper Phase One'' Arcade Soundtrack as the background music in the options section under the audio options.
Unlockable How to Unlock "Viper Phase One" Arcade Soundtrack Beat the "Training" Mission difficulty without continuing Contributed By: S Forgel.
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