Once again, 3D Realms has given away the source to one of its older games: Shadow Warrior. You can read about the release here and the README here, including directions on how to compile the source with the ancient Watcom C/C++ compiler under DOS/Windows.
Please note that this is a source release only. The data files are not redistributable. Here’s the quote from the README:
All of the Shadow Warrior data files remain copyrighted and licensed by 3D Realms under the original terms. You cannot redistribute our data or data files from the original game. You can use our data for personal entertainment or educational purposes. If you need the data, you can order a Shadow Warrior CD from our store on our website (http://www.3drealms.com).
There is, however, a demo version which could potentially be compatible with any source ports that are made.
As with the Duke Nukem 3D, the Shadow Warrior source is available under the GPL, so a GNU/Linux port is not only possible, but seemingly inevitable. Perhaps a unified BUILD-game codebase could be developed to handle all BUILD games, like the DooM ports which also play Hexen and Heretic?
Anyone taking bets on how long before a mostly-working GNU/Linux verison is hosted on icculus.org?
Shadow Warrior: So here's what about 3 hours of heavy labor gets you: http://icculus.org/shadowwarrior/firstrun.jpg Obviously lots of work to do on this, but it runs mostly correctly, sound and all.