Pause the game and press L1(2), L2(2), L1, R1, L1, R1, R2, R1. Note: Each time this code is used your level will go down by one.
At the title screen, press Circle, X, Right, Left, Right, Left, Down(2), Up(2). Alternatively, successfully complete the game on any difficulty to unlock Versus mode with five frames and most stages. Successfully complete the game on any difficulty twice to unlock the remaining two frames and stages.
Successfully complete the game on any difficulty with at least a "D" rank to unlock all characters and levels in Versus mode.
Successfully complete the game on any difficulty and get an "A" rank on all five S.O.S. rescue missions to hear a different ending theme during the end credits.
Intentionally do badly during the game by destroying all buildings and killing all survivors during the various missions. This includes completely destroying the colony shaft during the last SOS mission. Defeat Tyrant, then go to the Mountain 1 level to view the worst ending. To get the alternate ending easily, play the game in Easy mode. Once you get to the final mission, just explode all bombs except for one or two. After that, you will hear the second ending song called "A Light With The Name Of Hope".
|Master Code (Must Be On)||ECB78414 1456E60A|
|Infinite Javelin Ammo||4CDF7052 1456E404|
|Infinite Geyser Ammo||4CDF7058 1456E404|
|Infinite Bounder Ammo||4CDF7056 1456E404|
|Infinite Phalanx Ammo||4CDF705C 1456E404|
|Infinite Halberd Ammo||4CDF705A 1456E404|
|Infinite Comet Ammo||4CDF7060 1456E404|
|Infinite Gauntlet Ammo||4CDF705E 1456E404|
|Infinite Sniper Ammo||4CDF7064 1456E404|
|Infinite Decoy Ammo||4CDF7062 1456E404|
|Infinite Mummy Ammo||4CDF7068 1456E404|