Beat the game using only 1 credit and after the ending is over you will see a special funny credits cast list.

If the player initials entered for the top 3 high scores are CAP, COM, GUY and in that order, you will begin a new game with 5 credits instead of 3.

Hold L+R and press the Start button at the title screen. Press up, down, and X to adjust the options. Press R to play the music and sound effects.

Wait until the man asks Mike Hagar to turn on the television during the introduction sequence. Then, press [Help] five times to enable cheat mode and invincibility to punches and kicks. Press one of the following keys to activate the corresponding cheat function.

Pause gameplay and type: