W3X - Warcraft 3 Expansion Map FIle is a file type that is used for game maps or scenario situations created for the Warcraft III: The Frozen Throne videogame expansion packs. This file type also includes most of the terrain information, units, regions and myriads of other objects that are capable of being placed within the map itself. This type of file might be included within the game itself or possibly created by other players who are using a popular Warcraft III world editing application. The W3X - Warcraft 3 Expansion Map FIle can also be used for the Defense of the Ancients Allstars Modification program, which is actually a customizable map that was changed to create more competitive game play with custom hero avatars. This extension is mostly used on standard Warcraft III maps.