Hold A + B, press reset, release both buttons,
then choose the "Mission" or "Drive" option.
Press Up or Down when Devon appears to select the
starting level. Press Start to begin game play at the
Boss battle, weapon select:
Press Start to pause game play. Then, hold Up/Left
+ A + B and press Select to change weapons.
Press Start to resume game play at the Boss of the current
View ending sequence:
Hold Select and reset the NES.
Desert Battle level:
Enter NSMRNQIUKRISD as a password.