To become invincible, you first have to get to the Build Secret Base on the Dark Side of the Moon menu. To do this, press SELECT, then enter L, RIGHT, B, L, R, LEFT. Once you've gotten access, press A to get the password screen. Then type "god" to activate invinicibility.

To instantly refill all of your ammo, you first have to get to the Build Secret Base on the Dark Side of the Moon menu. To do this, press SELECT, then enter L, RIGHT, B, L, R, LEFT. Once you've gotten access, press A to get the password screen. Then enter "ammo."

To activate all weapons in the game, you first have to get to the Build Secret Base on the Dark Side of the Moon menu. To do this, press SELECT, then enter L, RIGHT, B, L, R, LEFT. Once you've gotten access, press A to get the password screen. Then type "weap".

Press SELECT to enter the game menu and then press L, RIGHT, B, L, R, LEFT to go to another screen. Enter the password menu and enter the following:

• HEA - 200 health
• GOD - god mode
• WEAP - all weapons
• AMMO - all ammo
• ARM - armor
• KEY - all keys
• MON - display enemies on the map
• FRE - freeze enemies
• COOR - display coordinates