Versus mode:
Complete the game on any difficulty to get versus mode with five frames and most stages. Complete the game on any difficulty twice to get the remaining two frames and stages.
All characters and levels in versus mode:
Complete the game easy mode with at least a D rating.
Alternate ending music:
Complete the game on any difficulty and get an "A" rank on all five rescue missions to hear a different ending theme during the end credits.
Max Out Health & Ammo:
After pausing the game press L1, L1, L2, L2, L1, R1, L1, R1, R2, R1
Get Disco Mode:
Go to the options menu and press Up, Down, Down, X, Triangle, Left, Right, Square
Get Versus Mode:
Go to the Title Screen and press Circle, X, Right, Left, Right, Left, Down, Down, Up, Up
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