NetHack

NetHack is a single-player roguelike video game originally released in 1987. It is a descendant of an earlier game called Hack (1985), which is a descendant of Rogue (1980). Salon describes it as "one of the finest gaming experiences the computing world has to offer." NetHack is licensed under the NetHack General Public License.

The "net" element references the fact that its development was coordinated through Usenet, even before the internet existed in its present form. The "hack" element refers to the game it was based on, Hack. The player takes the part of a dungeon-delving character in search of the Amulet of Yendor.