Complexity is generally used to characterize something with many parts where those parts interact with each other in multiple ways. There is no absolute definition of what complexity means; the only consensus among researchers is that there is no agreement about the specific definition of complexity. However, a characterization of what is complex is possible. The study of these complex linkages at various scales is the main goal of complex systems theory.

compLexity Gaming (coL) is a professional American eSports organization that competes in Heroes of the Storm, Call of Duty, Dota 2, , Heroes of Newerth, StarCraft II and . From 2006 to 2009 they were a franchise of the Championship Gaming Series known as the Los Angeles Complexity. They have previously sponsored players and teams competing in League of Legends, , Dead or Alive 4, Forza Motorsport 2, FIFA 07, and Smite. compLexity was founded by Jason "1" Lake in 2003 as a Counter-Strike 1.6 clan.