3 Extra Continues
At the Game Over screen, press Down+Left+1.
Effect Code 3 Extra Continues Down+Left+1 at the Game Over screen.
Contributed By: Mezmorize99.
9 additional Continues
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.
Contributed By: Atombender.
Press Right, Left, Down, and Up on the title screen.
Contributed By: Captain Doormat.
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.
Contributed By: Pluvius.
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.
Contributed By: Frogacuda.
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