World of Warcraft is a massively multiplayer online role-playing game developed by Blizzard Entertainment. It was originally released in 2004 and currently has 6 expansions, with Legion being the most recent. The game features two opposing factions, the Alliance and Horde, made up of different playable races and classes. Players can take on roles like tanks, damage dealers, or healers. Endgame activities include player versus player combat or player versus environment content like dungeons and raids.