Galactic Trooper

Galactic Trooper is a shoot ’em up variant of Astro Invader, drawing on the arcade style of Space Invaders. Players move a gun along the bottom of the screen and fire at aliens above.

Aliens enter columns one at a time, filling them before descending toward the player. They explode when they reach the ground. Landing crafts also appear periodically, and stopping them from landing is the main objective beyond pursuing a high score; a successful landing costs the player a life.

The game offers three skill levels and was developed by David J. Anderson and published by Romik Software for the Sinclair ZX Spectrum in 1983.