TRYMEON         Invincibility
GIVITIUP        All weapons
URDUSTD         Turbo
JUMPNIT         Skip to the Next Level
WORMITx         (Where x is a level #) Level warp

Increase Ammo:
PACKIN1         Servo Laser
PACKIN2         Isokenetic Gun
PACKIN3         Rapid Laser
PACKIN4         DOM
PACKIN5         Viper
PACKIN6         Baryon
PACKIN7         Superbomb