Auto Play- On the Setup screen, on the Control Pad repeat the following sequence three times: Left, Right, Up, Down, Left C, Right C, Left C, Right C. The game will begin a self-running demo.

50 Extra Lives- From the Setup menu hit: Up, Up, Down, Down, Left, Right, Left, Right, C-Left, C-Right, C-Left, C-Right.

Flame Thrower- While playing hit: Down, Right, Down, Right, C-Right.

Four-Way Fire- While playing the game hit: Down, Down, Up, C-Right.

Game Boy Mode- From the Setup menu hit: Up, Down, Right, C-Left, Down, Up, Left, C-Right, Up, Down.

Level Select- From the Setup menu hit: Down, Up, C-Left, Down, C-Left, C-Right, Down, C-Right.

Radiation Spray- While playing the game hit: Up, Down, C-Right, C-Left.

Shield- While playing the game hit: Down, Left, C-Left, C-Right.

Speedup- While playing hit: Left, Left, Right, Right, C-Up.

Three-Way Fire- While playing the game hit: Right, Right, C-Left, C-Down.

Two-Way Fire- While playing the game hit: Up, C-Up, Up, C-Up.