Heroes of the Storm (Originally titled Blizzard DOTA and later changed to Blizzard All-Stars) is a multiplayer online battle arena video game developed by Blizzard Entertainment for Microsoft Windows and OS X. The game features heroes from Blizzard's franchises including Warcraft, Diablo, and StarCraft. The game uses both free-to-play and freemium models and is supported by micropayments, which can be used to purchase heroes, visual alterations for the heroes in the game and mounts.