In December 2015, the "Descent" trilogy was withdrawn from Good Old Games. A representative of Parallax Software responded to speculation on the Good Old Games forums, regarding the withdrawal of the titles. It was claimed that Parallax - still in existence - owned the copyrights to the first two games, but had not been paid royalties on their sale since 2007 by publisher Interplay. As a result, Parallax had terminated the 21 year sales agreement, meaning Interplay no longer had permission to distribute "Descent" or "Descent II". This post did not touch on the reasons for Descent 3's removal. "Descent" and "Descent II" remained available through Steam , despite Parallax's assertion that this should not be the case. The game was finally removed from Steam in July 2016. However, in November 2017, GOG.com announced that the "Descent" series would be available for sale again on their platform. The game has now also resurfaced on Steam.