There is no official word from Valve, the developers of Dota 2, on what is considered canon in the Dota 2 universe. However, many fans believe that the Dota 2 anime is canon, as it is based on the popular video game of the same name. The anime follows the story of two teams of five players who battle each other in the game's signature MOBA mode. While the anime does not directly tie into the game's lore, it does introduce new characters and concepts that are not found in the game, making it its own separate canon.