Warhammer 40,000 (informally known as Warhammer 40K, WH40K or simply 40K) is a tabletop miniature wargame produced by Games Workshop, set in a dystopian science-fantasy universe. Warhammer 40,000 was created by Rick Priestley in 1987 as the futuristic companion to Warhammer Fantasy Battle, sharing many game mechanics. Expansions for Warhammer 40,000 are released periodically which give rules for urban, planetary siege and large-scale combat. The game is in its seventh edition, which was released on May 24, 2014.
Players can assemble and paint individual, 28-millimetre (1.1 in) scale miniature figures that represent futuristic soldiers, creatures and vehicles of war. These figurines are collected to compose squads in armies that can be pitted against those of other players. The models are physically moved around the table and the actual distance between models plays a role in the outcome of combat. Play is turn-based, with various outcomes determined by tables and the roll of dice. Battles may last anywhere from a half-hour to a whole weekend, and battles may be strung together to form campaigns.
A close friend of mine introduced me to the game about 5 years ago and I've thoroughly enjoyed all aspects of the game ever since. I currently run the Warhammer 40k League and the Warhammer Apocalypse Events. The 40K League meets every Tuesday at 6 PM and we have an Apocalypse event once a month (usually on a Sunday).
Come check out the League meetings of contact me (firstname.lastname@example.org) to schedule a demonstration if you're curious about getting started with Warhammer 40K.