The story takes place on a planet where an alien race has taken over. The player's character, a space pilot, is stranded on the planet after crash-landing his ship. The alien leader demands that the pilot destroy all the planet's resources, but the pilot refuses and sets out to stop the aliens.
Gameplay involves shooting enemies and collecting power-ups while navigating through 6 levels of increasingly difficult terrain. Players must also manage their fuel supply, as running out will cause the ship to crash. The game features simple graphics and a variety of enemy types, including robots and flying creatures.
Cosmic Debris was released for the ZX Spectrum in 1983 and remains a classic action-adventure game from the early days of home computing.