Complexity Gaming (abbreviated COL; previously stylized as compLexity Gaming and coL) is an American professional esports organization that competes in Counter-Strike: Global Offensive, Call of Duty, Dota 2, Hearthstone, Gwent: The Witcher Card Game, Rocket League, Clash Royale, Fortnite and Madden. They were a franchise of the Championship Gaming Series known as the Los Angeles Complexity from 2006 to 2009. They have previously sponsored players and teams competing in League of Legends, Counter-Strike: Source, Dead or Alive 4, Forza Motorsport 2, FIFA 07, Smite, Heroes of the Storm, Heroes of Newerth and StarCraft II. The organization is also affiliated with the World of Warcraft competitive raiding guild Complexity Limit. Complexity was founded by Jason "1" Lake in 2003 as a Counter-Strike 1.6 clan.
In November 2017, Dallas Cowboys owner Jerry Jones and Crescent Real Estate Holdings CEO John Goff acquired a majority stake in Complexity Gaming. As a result of this acquisition, Complexity's operations moved to Frisco, Texas, with their headquarters, the GameStop Performance Center, located at The Star, which also hosts the headquarters for the Cowboys. In September 2021, streamer TimTheTatman joined Complexity Gaming as a part-owner and content-creator.