Space Marines: Horus Heresy Mark IV Space Marines:

ames Workshop Group (often abbreviated as GW) is a British manufacturer of miniature wargames, based in Nottingham, England. Its best-known products are Warhammer Age of Sigmar and Warhammer 40,000. Founded in 1975 by John Peake, Ian Livingstone, and Steve Jackson, Games Workshop was originally a manufacturer of wooden boards for games including backgammon, mancala, nine men's morris, and Go. It later became an importer of the U.S. role-playing game Dungeons & Dragons, and then a publisher of wargames and role-playing games in its own right, expanding from a bedroom mail-order company in the process. It expanded into Europe, the US, Canada, and Australia in the early 1990s. All U.K.-based operations were relocated to the current headquarters in Lenton, Nottingham in 1997. It started promoting games associated with The Lord of the Rings film trilogy in 2001. It also owns Forge World (which makes complementary specialist resin miniatures and conversion kits)