On what date was League of Legends first released for Windows?

League of Legends was first released for Windows on October 27, 2009.

Riot Games launched the free-to-play multiplayer online battle arena in Europe and North America after a period of development and roughly six months of beta testing. The game was announced in October 2008, but that announcement date is not its release date; October 7, 2008, therefore refers to the announcement period rather than the launch.

Development was influenced by the custom Warcraft III map Defense of the Ancients, commonly called DotA. Riot’s founders wanted to build a standalone game around that style of competitive, team-based strategy while making it continuously expandable through new champions and updates. Riot initially planned to launch with 20 champions, but the roster was doubled before release.

The Windows launch came before later platform and regional expansions. League eventually became one of the world’s most prominent esports, with annual World Championship competition and a large professional ecosystem. Dates such as 2013 relate to later milestones, not the original Windows release.