community source ports. It was later ported to RISC OS by R-Comp Interactive, and the port debuted at the annual Wakefield Acorn RISC OS Show on May 19, 2001. Descent II entered digital distribution when it appeared on GameTap on September 7, 2006. It subsequently became one of the launch titles of the Good Old Games beta on September 8, 2008, and on February 19, 2014, it was re-released on Valve's Steam digital distribution service. However, the Descent trilogy was withdrawn from Good Old Games in December 2015 after its creators, Mike Kulas and Matt Toschlog, alleged that Interplay, who owns the Descent trademark but not the copyright of the trilogy, had not paid the developers royalties on their sale since 2007. As a result, Parallax terminated the 21-year sales agreement, revoking from Interplay the permission to distribute the trilogy. Later, the games were also removed from Steam. The trilogy returned on Good Old Games for sale in November 2017 and later on Steam. Reception Upon release, Descent II received very positive reviews from video game critics. Citing its replay value, GameSpot commented: "If you don't like Descent at least a little bit, make no mistake, there is something wrong with you." Next Generation opined that a few sequels "can boast the improvements like those made on Descent II", citing the SVGA graphics, the story sequences in full motion video, and the new items. It forgave the same simple mission formula because of the improvements. Computer Gaming World compared the gameplay and enhancements of the sequel to those of Doom II, but complained about the graininess of the textures, and the two magazines warned that players who did not care for the original might not care for the sequel either. The addition of the Guide-Bot was well-received. In a very positive review, PC Magazine considered it to be a valuable addition to the game "because the automap is just as confusing as it was in the original game". Conversely, PC Review felt the Guide-Bot ran contrary to the disorienting character of the series and that the Guide-Bot diminished the need to use strategy, but did write that using the robot was optional. Computer Game Review liked the AI of the new cast of robots in general and other measures taken to prevent getting lost, such as plotting map positions with markers. The multiplayer mode was also widely lauded. Computer Games