Each mission has a different goal, but in most cases, you have to terminate all the aliens. It's a squad management turn-based game set in space, where the player controls a team of five marines fighting against aliens. The video game was created by Gremlin Graphics and released in 1992 for the Amiga, Atari ST, Commodore 64, and other platforms. Space Crusade is a computer adaptation of the 1990 Games Workshop boardgame set in the Warhammer 40,000 universe.