Nice, thanks for sharing this!

Looks like the commercial game Planet X3 is now open source (GPLv2) as well:
https://github.com/planet-x3/px3_ose

Here's a really obscure game that went open source. It's was originally called Super Pooh, an unlicensed DOS action platform game based on Winnie the Pooh characters (but with a few twists, being mostly inspired by the Soviet version).

It was sold commercially in the 90s, then the author was able to negotiate an international release on consoles, but all Pooh references had to be removed for copyright reasons, so the game became Super Plusha. Actual gameplay and levels remained the same.

The DOS game was rediscovered by enthusiasts in 2010, and the author was happy to provide the full version and the source code. Based on this, an updated DOS version and a Windows port was created by CTPAX-CHEATER, which is available here along with an interview with the author (all in Russian though):
https://ctpax-cheater.losthost.org/htmldocs/pooh.htm

The source code is released under the Apache 2.0 license and available here:
https://github.com/D0NM/Vinnie

The author gave full permission to do anything with the game data.

I happened to find this WP article yesterday, and it might have some games mentioned that aren't on this thread.... though the way WP works, that article is more likely to be updated from this thread.

https://en.wikipedia.org/wiki/List_of_commerc … ?useskin=vector

progman.exe wrote on 2024-03-10, 15:42:

https://en.wikipedia.org/wiki/List_of_commerc … ?useskin=vector

I certainly went through that list a while ago. I can't be certain I didn't miss anything, but most of the commercial DOS games with available source code are either very well known, or completely obscure and not listed there at all.

I just realised that several of the older games by Johan Peitz (Free Lunch Design) have their source code available from here:
http://www.dtek.chalmers.se/~d98peitz/fld/download.shtml

Another DOS game with the source code possibly lost: G-Fighter by Gaping Wolf Software. I was able to find the game itself here: gfighter.zip. The game was created using Allegro, but not archived at allegro.cc.

An older page of the same developer is available here:
https://web.archive.org/web/20000914170407/ht … /~rhanvark/gws/