

The player assumes the role of a fighter pilot striving to halt an alien invasion. The aliens have taken over Earth and constructed four land bases. These bases are designed to siphon Earth's energy and transmit it to their central space station. If the space station accumulates enough energy, it will obliterate Earth with a powerful laser strike. The player's objective is to destroy each enemy base and ultimately target the space station itself. Throughout the game, scientists are developing a classified Neutron Cannon. In several missions, the player must deliver supplies to these scientists working in secret underground facilities. Occasionally, aliens will capture a scientist, and the player must then defeat the alien base and rescue the scientist, bringing them to safety.
| NES | December 31, 1990 |
| Arcade | December 31, 1990 |