The story of Invasion revolves around an alien invasion that has left Earth's cities in ruins. The player takes on the role of a survivor, tasked with navigating through the devastated landscape to find a way to escape.
The gameplay in Invasion is fast-paced and action-packed, requiring the player to move their character between buildings while avoiding enemy fire. As the game progresses, new obstacles and enemies are introduced, increasing the challenge for the player.
Invasion was released for the ZX Spectrum in 1987 and has since become a cult classic among retro gaming enthusiasts.