The spiritual successor to Defense of the Ancients, a popular Warcraft III: The Frozen Throne custom map, League of Legends is a free multiplayer action-RPG, supported by micro-transactions, combining elements from both strategy and role playing games. Set in the high fantasy world of Valoran, players summon mighty champions to turn the tides of battle in the Fields of Justice.

League of Legends was developed and published by Riot Games and was released October 27, 2009. Naked Sky Entertainment contributed to the development of the following AI components of the game: AI scripting system integration, A.I. task management system, A.I. pathing. Naked Sky also built the spell scripting system, spell script development tool system, and contributed to spell development.