NetHack is described as 'Single player dungeon exploration game that runs on a wide variety of computer systems, with a variety of graphical and text interfaces all using the same game engine. Unlike many other Dungeons & Dragons-inspired games, the emphasis in NetHack is on discovering' and is a role-playing game in the games category. There are more than 25 games similar to NetHack for a variety of platforms, including Windows, Mac, Linux, Android and Steam apps. The best NetHack alternative is Cataclysm: Dark Days Ahead, which is both free and Open Source. Other NetHack like games are Shattered Pixel Dungeon, Pixel Dungeon, Ancient Domains of Mystery and Dungeon Crawl Stone Soup.