The game was first released as C source code on the UseNet newsgroup comp.sources.games July 5th, 1988 (and here's that post!), intended, as the author recounts, for play on UNIX text terminals such as TVI910 or Wyse60.
A graphical version was circulated (counter to the license, without the credits information) by SCO with their UNIX distribution in 1990, though when the author applied for a job there they declined to grant him an interview. As he ponders on his website, "Maybe they had taken a look at the code..." Add
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Wanderer was likely released for the Linux platform, though the exact year is unknown. It is past the previously listed date of 1988, as Linux was not invented back then. Add