
The player pilots a ship (reminiscent of the Battlestar Galactica) capable of firing weapons and maneuvering left or right. It's essential to keep an eye on the temperature and fuel indicators onscreen—should the ship overheat, its weapons will be disabled, and if fuel runs out, the ship will explode. Players must fight through successive waves of enemies, each with unique formations and movement styles. Once a wave is cleared, the next one arrives. At the end of each sector, the player navigates an asteroid field and can collect additional fuel by firing at fireballs. Following this, the player reaches the mother ship to dock and refuel for the next section. Additionally, players earn various rewards for achieving specific accomplishments, such as defeating enemies in a particular sequence or eliminating all enemies without a single miss.
| Arcade | March 1, 1981 |
| ZXS | December 31, 1983 |