Super Stardust

Type the following codes as passwords in the title screen

NOBRAKES : Full Engine Power
HARDGAME : Makes the game even harder
DNUMUACHS : Ten times the energy, but only one life
DIEALIENDIE : All weapons go to full power
JJRULES : 35 lives and fully powered weapons
WARHEAD : Missiles detonate on impact
ELITEMASTER : Weapons are 10 times as powerful
PETSKUMODE : Enables the reverse gear (Information from Cheat Machine)