Just as the game starts go to properties and go to advanced
and there will be a little box, in the box type:
1037 for easy fatalities; 3871 to play as GROX:
9021 to play as EROX; 9997 to play on a secret level.
In the cheat code box, type " 1971" to make player
one invincible. This is really needed for the high
difficulty and cheesy gameplay against the computer.