Incentive Software, 1988
The game is set on the alien moon Tricuspid orbiting the planet Evath. Terrorists (the Ketars, the villains of the previous game Driller) hijacked the moon's facilities and built Zephyr One, an immense beam weapon on the moon's dark side with the purpose of destroying Evath. The player is a government agent, sent secretly to the moon's surface with the mission of deactivating the weapon before it becomes fully charged. This is accomplished by destroying a power network in the form of ECD (Energy Collection Device) columns, dotted around the moon and connected with power lines all the way to the beam weapon.