Warhammer n. fantasies; adj. fantastic
1. n., in general usage, a creation of the imaginative faculty whether expressed or merely conceived; as a fanciful design or invention, a chimerical or fantastic notion; Middle English fantasie “mental image,” Latin phantasia  “idea”; c. 1300.
2. imaginative fiction featuring especially strange settings and grotesque characters; also fantasy fiction.
3. in gamerese, a catch-all name for any game milieu directly or indirectly inspired by the pseudo-medieval Anglo-Saxon mythological setting of JRR Tolkien’s fantasy fiction; such milieux usu. feature quasi-medieval technology and social structure, terrain similar to that of medieval Europe, magic systems based on European Hermetics, and fantasy creatures from European mythology and/or Tolkien’s literature. See Tolkienesque.
4. any game milieu or fictionalized setting in which magic is a reality.

Addendum: Examples of games that take place in a fantasy milieu include: Advanced Dungeons & Dragons, Rolemaster, GURPS Fantasy, ShadowrunMiddle Earth Role-Playing (MERP), World of WarcraftWarhammer Fantasy Battle, and Magic: The GatheringAlthough technically fantasy, occult-based games such as Call of Cthulhu and the World of Darkness games are usually not referred to by this term.

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