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« on: August 01, 2024, 05:29:40 PM »
I did some research just recently, and this is my current understanding.
The program called "rogue" included in some BSD and Linux distributions, is actually Rogue Clone III by Tim Stoehr. This is a clone that was written from scratch. The code includes a non-commercial clause, making it non-free for Debian.
The original Rogue by Michael Toy, Glenn Wichman, and Ken Arnold was distributed with early BSD in binary form only (to make cheating harder, I reckon).
A salvaged copy of the source code for a development version of Rogue V5 was found in 1999 and published by Ken Arnold on SourceForge in 2000. The SourceForge project page (by Arnold himself) states the license as "BSD License" with no further specification. The source code includes no license at all.
Finally, the versions released by the Roguelike Restoration Project are released under the 3-clause BSD license, with proper authorship attribution. However, I could find no information on what vetting process, if any, was in place there. The RRP V5 is based on Arnold's SourceForge code, but other RRP versions are based on leaked and often modified code bases found on the internet.