Ultra Marines is one of a series of 4 "introductory" board games released by Games Workshop in 1991 (The other three being Space Fleet, Kerrunch and Mighty Warriors). Set in the Warhammer 40,000 universe, it is effectively a 'scaled-down' version of Space Hulk and Tyranid Attack, using plastic Marine Scouts from the Ultramarines, Space Wolves, Dark Angels and Blood Angels chapters. Other components include event cards, a simple ruleset, as well as corridor and room tiles from the game Space Hulk.