The Flat Rock Software GitHub Page now offers the source code for some of the first games developed by id Software, including TheCatacomb, Catacomb3D, Catacomb, and Hovertank3D. These packages are being offered for free under the GPL, though like other such releases, this covers the code, not the art assets, which will still required licensed copies (which are sold by Flat Rock). This inspired a nostalgic Tweet from John Carmack: "Thanks to Flat Rock Software and @Blzut3, the early code I wrote for Softdisk is going GPL. https://github.com/FlatRockSoft/ Turbo Pascal memories." Thanks Phoronix.