Phase select
Type "gimme" at the phase selection screen.
Mission select
Hold [Left Shift] + [Left Alt] + [Left Ctrl] immediately after selecting the "New Game" or "Resume" options.
Cheat mode
Enter one of the following codes to activate the corresponding cheat function.
| Toggle weak opponents | D + E + T + H |
| Ammunition | A + M + O |
| Best chopper weapons | M + E + G + A |
| Toggle hit point boost | L + I + F + E |