NetHack is a 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 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.

NetHack is available in binary ("ready-to-run") form for a number of systems.

* Linux * MS-DOS, Windows3.1 * Windows 95/98/NT/2000/Me/XP * Macintosh * Amiga * OS/2 * Atari

There's also source code to look at if you're so inclinded to "look under the hood"

Official Source Release

The source release includes all the code for the above versions plus code for the systems listed below.

* Unix (*BSD, System V, Solaris, HP-UX, ...) * BeOS * VMS

http://www.nethack.org/