single player dungeon exploration
NetHack is a single player dungeon exploration game, with a variety of graphical and text interfaces all using the same game engine.
NetHack Portable works best with the PortableApps.com Platform
Unlike many other Dungeons & Dragons-inspired games, the emphasis in NetHack is on discovering the detail of the dungeon and not simply killing everything in sight - in fact, killing everything in sight is a good way to die quickly. Each game presents a different landscape - the random number generator provides an essentially unlimited number of variations of the dungeon and its denizens to be discovered by the player in one of a number of characters: you can pick your race, your role, and your gender.