The player controls a ship with either 8 or 4 fuel cells to defend from waves of pirate ships. The number of fuel cells and abilities of the pirate ships depends on the difficultly settings. Each wave of pirate ships will attempt to grab and remove the player's fuel cells. Each wave consists of a different type of pirate until 6 waves have been destroyed, then the waves begin again faster and with more ships.
Once all the player's fuel cells have been stolen, the game is over. If the player's ship collides with either a pirate ship or pirate's laser fire then they will lose a life. However, lives are unlimited as long as there is at least one fuel cell remaining.
- Choose between one or two players-button one
- Choose level of difficulty (number of fuel cells/abilities of pirate ships)-button two
- Rotates left or right-joystick or D-pad
- Rotate left-button one
- Rotate right-button two
- Thrust-button three
- Fire-button four
- Pirate 1-10 points
- Pirate 2-20 points
- Pirate 3-30 points
- Pirate 4-40 points
- Pirate 5-50 points
- Pirate 6-60 points
- Destroy all six types of ships-Bonus +10, destroy all six types of ships again-Bonus +20, etc.