Alternate intro:
Hold A or B and turn on the N64 to view two different introduction sequences after the DMV man appears.

Bonus game:
To activate a bonus game (a cross between Asteroids and Defender), press Down, Up, Z, L, Down, Left, Z, Down at the Zone Select screen. If you did it right, you will hear a tone. Now enter any zone, then exit and return to the Zone Select screen. Cycle through the Zones and the bonus game should be there.

Recharge energy:	C-Left, L, Z, Down, L, Z, C-Left, C-Right.

Open Europe: 		Up, Down, L, Z, Down, Up, Z, Down

Open Ice:		Up, Down, Z, L, Down, C-Right, Z, Down

Open Jungle: 		Up, Down, L, Z, Down, C-Left, Z, Down 

Open Desert:		Up, Down, L, Z, Down, Left, Z, Down 

Open Final Stage:	Up, Down, L, Z, Down, Right, Z, Down 

Thanks to Revolution reader Apache Chief, Zac Boyer, Tadd Mullarkey, JDuran8444, and Steven Nguyen!