Modding Warcraft III: Reign of Chaos

As did Warcraft II and StarCraft before it, Warcraft III ships with a "World Editor" program that allows players to create their own custom scenarios and maps. The World Editor has features such as unit editing and event triggers. Through Battle.net, players can download and play peers' custom maps. To facilitate modding, third-party developers released tools for spell editing through SLK spreadsheets, customizing skins with .BLP converters, JASS editing, and a file importer that opened up .MPQs. The World Editor was expanded and improved for The Frozen Throne expansion. Though the editor has received updates through game patches, it is not officially supported as a product.^[27]
Some custom maps have enjoyed great success, with Defense of the Ancients (DotA) being a tournament item at Blizzcon 2005 and other tournaments around the world.^{[citation needed]}. Various new types of games have been created included Role Playing and Tower Defense maps.^[28]