Space Harrier Cheats

Press Right, Left, Down, and Up on the title screen.

After the game is over and you can see the ''Game Over'' letters,
press Up, Up, Down, Down, Left, Right, Left, Right, Down, Up, Down, Up on the control pad.

At the sound test screen (accessible by pressing Right Left Down Up at the title screen) choose the following sound tests: 7, 4, 3, 7, 4, 8, 1. You will get a secret options screen which will allow you to select new difficulties, change the control, and use a jet instead of your normal character.

If you put the initials "ERI" in all seven spots on the high score list (done by scoring over a million points in seven games without turning the console off), you will get a strange message.