The game's developer, Riot Games, was co-founded by Brandon "Ryze" Beck and Marc "Tryndamere" Merrill, who were roommates while they attended the University of Southern California. They partnered with Steve "Guinsoo" Feak, the previous designer of the popular Warcraft III: The Frozen Throne custom mod Defense of the Ancients, and Steve "Pendragon" Mescon, the administrator of the former official support base for the map, to develop League of Legends
The original inspiration for "DotA" was a 1998 mod for StarCraft created by community member Aeon64 called "Aeon of Strife". After the release of Warcraft III: Reign of Chaos and its subsequent World Editor in 2002, DotA was created by another modder, Eul. He ported and expanded the "Aeon of Strife" mod to the new engine and named it "Defense of the Ancients". Guinsoo later made DotA Allstars by inserting his own mix of content to "DotA", greatly expanding the number of heroes, added recipes and items, and introduced various gameplay changes. Guinsoo then passed the mod to IceFrog after accepting a job at the newly formed Riot Games
The idea of a spiritual successor to Defense of the Ancients was that it would be its own stand-alone game with its own engine, rather than another mod of Warcraft III, began to materialize at the end of 2005. League of Legends was born "when a couple of very active DotA community members believed that the gameplay was so much fun and so innovative that it represented the spawning of a new genre and deserved to be its own professional game with significantly enhanced features and around-game services