While playing the game, press [Plus] (on the top row of keys), then type one of the following codes to activate the corresponding cheat function:
| Result | Cheat Code |
| Maximum energy | _givememaxenergy |
| All weapons | _givemeallweapons |
| Full ammunition | _givemeallammo |
| Extra money | _givemethemoney |
| Enable debug mode | _dev_mode_on |