Upgrade a song at the Tapesmith
Finish every stage cooperatively on Double Dragon difficulty with friendly fire enabled!
Max out every song to level 50!!
Finish every stage solo on Double Dragon difficulty!
Use every weapon once
Dodge and get the Gleam 50 times
Complete any level without taking damage
Break all the Skullmageddon monitors in the Rocket Dojo
Nail all enemies with the hair pick
Defeat Skullmageddon!
Complete any level in co-op without taking any damage... with friendly fire enabled!
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