Warhammer 40,000 is a tabletop miniature wargame set in a dystopian science fiction universe. Players collect and paint miniature figures representing various factions, such as the Imperium of Man, Chaos, and Eldar. The game involves strategic battles on a tabletop battlefield, where players use dice to determine the outcomes of their actions. The lore of Warhammer 40,000 is rich and complex, featuring a dark future where humanity is beset by alien races and supernatural threats. The game has expanded into novels, video games, and other media, creating a vast universe that captivates fans with its themes of war, survival, and heroism.