Horse Isle is a browser-based massively multiplayer online role-playing game (MMORPG) first released in 2007. The game was developed and published independently by American duo Joe and Miranda Durbin. In May 2010, the second edition of the game, Horse Isle: Legend of the Esrohs was released, with gameplay and graphics differing significantly from the game's first release. This was followed by the released of Horse Isle 3: Infinite Wilds in August 2019, a downloadable three-dimensional edition of the game.