Dota 2 Workshop Tools

 The Dota 2 Workshop Tools is a set of software utilities available as a free download for Dota 2 that allow you to create your own custom game modes (called addons). The tools package must be installed to create or play any custom game mode addons.

At this time, the Dota 2 Workshop Tools are considered an alpha testing release and only suitable for custom game mode content authoring. Developers creating cosmetic content for inclusion in the Dota 2 store will need to utilize the existing tool path. More information on that path can be found on the Dota 2 Workshop website.