Note: An cartridge is required to use the following codes. Change the value of the indicated memory locations to adjust the corresponding game feature.
orhtvrm
Access the message screen at the HQ. Move the pointer to the first letter of the yellow message. Hold [Esc] and press the Left Mouse Button. The phrase "You Wouldn't Let It Die" will appear to confirm correct code entry. This will enable invincibility, unlimited fuel, and unlimited weapons. Note: The game can not be completed when cheat mode is enabled. Repeat the code to disable cheat mode. The phrase "Look At The Size Of That Sausage!" will appear to confirm deactivation of the code.
Move the pointer to the top left corner of the secondtitle screen. Hold [Left Shift] and press the Left Mouse Button to display a vertical line. Use the following keyswhile in the editor.
Type alf at the high score screen.