EverQuest, often called EQ, is a 3D fantasy-themed massively multiplayer online role-playing game (MMORPG) that was released on March 16, 1999. The original design is credited to Brad McQuaid, Steve Clover, and Bill Trost. It was developed by Sony's 989 Studios and its early-1999 spin-off Verant Interactive. It was published by Sony Online Entertainment (SOE). Since its acquisition of Verant in late 1999, SOE develops, runs and distributes EverQuest.

EverQuest has earned many awards, including GameSpot's Game of the Year Award for 1999. In 2008 Everquest was honored (along with Neverwinter Nights and World of Warcraft) at the 59th Annual Technology & Engineering Emmy Awards for advancing the art form of MMORPG games.

EverQuest II was released in late 2004. Set in an alternate universe similar to that of the original EverQuest, this "sequel" takes place 500 years after the awakening of The Sleeper. The game has also inspired a number of other spinoffs.