FreeGameDev

Not sure whether there's a huge interest in it here, but I thought I'd mention that the source for the game Amulets & Armor was GPL'd on GitHub a while ago. Link to GitHub: https://github.com/ExiguusEntertainment Link to Wikipedia's article about the game: http://en.wikipedia.org/wiki/Amulets_%26_Armor The game itself is also free as in beer.
Speaking of source releases, Commander Keen's source was recently found, so hopefully we'll see it GPL'd too whenever id Software approves of it. Wikipedia link: http://en.wikipedia.org/wiki/Commander_Keen

Ahh cool, too bad the artworks are only free as in beer.

As for Commander Keen, well there is already a pretty good open-source engine reimplementation, so we don't really need the original code.

Yeah, agreed, at least I Think the artworks are only free as in beer as the Exe directory in the repo which contains most artworks has a non-free license.txt. There's an Artworks directory, but that only contains a few Icons. The Windows installer uses the Common Public License 1.0 as license though, so I'm not sure.

I'll be mildly interested to poke around the code, since it has a DOOM-like renderer which was probably written from scratch but uses some of the same file formats as DOOM.

Cire {l Wrote}:Not sure whether there's a huge interest in it here, but I thought I'd mention that the source for the game Amulets & Armor was GPL'd on GitHub a while ago. Link to GitHub: https://github.com/ExiguusEntertainment Link to Wikipedia's article about the game: http://en.wikipedia.org/wiki/Amulets_%26_Armor The game itself is also free as in beer.
Speaking of source releases, Commander Keen's source was recently found, so hopefully we'll see it GPL'd too whenever id Software approves of it. Wikipedia link: http://en.wikipedia.org/wiki/Commander_Keen

umm... is anything else apart from cloning the github repo. (Amulets and Armor) to play the game in linux.

There is no Makefile (or similar) for a native Linux port, and there may be code missing for it too -- it seems only DOS and WIN32 are supported right now.

You can probably run the stuff in the "Exe" folder with DosBox (AA.BAT)