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All Weapons

Pause gameplay and press Up, Up, Down, Down, L, R, L, R, B, A.

Challenge B mode

Successfully complete the game in Challenge A mode.

Challenge A mode

Successfully complete the game to unlock the ''Challenge A'' option at the main menu.

Delete saved game

Enter the options screen, highlight "Exit", then hold L + R + B and press Start.

Self-destruct

Press Start to pause game play, then press Up(2), Down(2), Left, Right, Left, Right, B, A, Start.

All power-ups

Press Start to pause game play, then press Up(2), Down(2), L, R, L, R, B, A, Start. Note: This can only be done a limited number of times until it causes your ship to self-destruct.

Alternately press Start to pause game play then press Down(2), Up(2), Right, Left, Right, Left, A, B, Start. This code can be done as many times as needed, but costs one life. Additionally, it does not provide the Speed power-up.