Dunnet is a surreal, cyberpunk[1] text adventure written by Ron Schnell, based on a game he wrote in 1982.

Throughout the game the player moves through different areas and rooms trying to collect treasure to earn points.

[7] Emacs comes with most Unices, including macOS (prior to version 10.15 Catalina)[8] and distributions of Linux.

Several articles targeted to Mac OS X owners have recommended it as an easter egg as a game that can be run in Terminal.app.

[11] Dunnet was used as a benchmark in the effort to port Emacs Lisp to Guile, progressing from running standalone games[12] to running the entire Emacs system in less than a person-year of work.