The code entry dialog is accessed by pressing CTRL-ALT-X

Then enter the following cheats…

cruise control    	turns on cruise control
im back              	repairs any damage
lock and load        	refills ammo
mr fabulous          	makes the user invulnerable
moon			Moon gravity
mars                    Mars gravity
earth			Earth gravity
jupiter			Jupiter gravity
sampo			$999,999
beefcake beefcake	Fill weapons and ammo

*Note: These codes only work on players choice mode

Thanks to Revolution readers Daniel Ankrum, Mario Friedmann, Leszek Skorut and

Craig Tabita!