Unlock Bonus characters
When you have earned at least an 'AM' rank in ALL the missions of the indicated challenge the corresponding bonus character will become available.
Unlock El Patinador:
Get 'AM' rank in ALL Rigger challenge missions.
UnlockJudy Nails from Guitar Hero:
Get 'AM' rank in ALL Career challenge missions.
Unlock MCA from the Beastie Boys:
Get 'AM' rank in ALL Hardcore challenge missions.
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