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CHEATS
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Pause game play, hold L + R and enter one of this codes. A sound will confirm
correct code entry.

 Invincibility*                   Y, B, A, X
 Restore health                   Y, DOWN, A, UP
 Restore ammunition               A, DOWN, Y, UP
 Unlimited missile weapons*       B, X, A, Y

 Add 1000 experience points       A, DOWN, DOWN, DOWN
 Level 2 skills                   X, RIGHT, X, RIGHT
 Level 4 skills                   Y, UP, Y, UP
 Level 6 skills                   B, LEFT, B, LEFT
 Level 8 skills                   A, A, DOWN, DOWN
 All combo upgrades*              Y, X, Y, X

 Devastating attacks (hold Y)*    B, B, X, X
 Small enemies*                   Y, Y, A, A
 Slow motion*                     Y, X, A, B

   * The game must be completed first before you can enable this code.