Enter codes during gameplay:
 NOBRAKES -Full engine power
 HARDGAME -Makes game HARDER
 DNUMUAHCS -Gives 10x more energy, takes you down to one life
 DIEALIENDIE -All weapons at full power
 JJRULES -35 lives and full power
 WARHEAD -Missiles detonate on impact
 ELITEMASTER -Weapons 10x more powerful
 PETSKUMODE -Enables reverse mode gear