Warhammer Fantasy is a fictional fantasy universe created by Games Workshop and used in many of its games, including the table top wargame Warhammer Fantasy Battle, the Warhammer Fantasy Roleplay (WFRP) pen-and-paper role-playing game, and a number of video games: the MMORPG Warhammer Online: Age of Reckoning, the strategy games Total War: Warhammer, Total War: Warhammer II and Total War: Warhammer III and the two first-person shooter games in the Warhammer Vermintide series, Warhammer: End Times - Vermintide and Warhammer: Vermintide 2, among many others.

Games Workshop Group is a British manufacturer of miniature wargames, based in Nottingham, England. Its best-known products are Warhammer and Warhammer 40,000.