timedemo uscache
The DOOM3 source is here https://github.com/id-Software/DOOM-3
There are lots of facilities for recording and playing back demos. The author could record their own gameplay and play it back in realtime vs running timedemo (which plays back as fast as possible).
https://github.com/id-Software/DOOM-3/blob/master/neo/framew...
2865: cmdSystem->AddCommand( "recordDemo", "records a demo" );
2866: cmdSystem->AddCommand( "stopRecording", "stops demo recording" );
2867: cmdSystem->AddCommand( "playDemo", "plays back a demo",
2868: cmdSystem->AddCommand( "timeDemo", "times a demo",
2869: cmdSystem->AddCommand( "timeDemoQuit", "times a demo and quits",
Here are a handful of ones that I really like (all related to gaming):
DOOM:
http://fabiensanglard.net/doom3/index.php - A great overview of it, mentioning the third game and its variants. Their whole github is pretty great. Just worth noting that many people consider Carmack's code to be some of the best in the industry. Really worth a read.
https://github.com/fabiensanglard/Doom3-for-MacOSX-
https://github.com/id-Software/DOOM
https://github.com/id-Software/DOOM-3
Monogame:
The Open Source implementation of Microsoft's XNA game dev framework. Really well loved C# code. And they keep it very clean.
https://github.com/MonoGame/MonoGame
Battle for Wesnoth:
Famous and well loved open source 4x game
https://github.com/wesnoth/wesnoth
Rogue-Likes:
There are a bunch of rogue-likes that are open source. It's a lovely look at the evolution of the genre and old school limitations. The genre as a whole is very open source friendly.
http://rephial.org/ - Angband
https://github.com/crawl/crawl - Dungeon Crawl Stone Soup
Lastly, here is a list of open source games. I would argue a huge chunk are not that nice. But there are gems in here. https://github.com/leereilly/games