Warhammer 40,000 (known informally as Warhammer 40K) is a miniatures wargame produced by Games Workshop, set in a dystopian science fantasy universe. Warhammer 40k was created by Rick Priestley and Andy Chambers in 1987 as a futuristic companion to Warhammer Fantasy Battle, and therefore shares the same gameplay mechanics. Warhammer 40k expansions are released from time to time, providing urban and planetary siege rules and large-scale combat.