Games on GitHub – A list of popular/awesome video games hosted on GitHub
Project is seemingly dead with the latest commit being from 2018.<p>Two major games with code on github I can think of are Amnesia: The Dark Descent (1) and Celeste (2)<p>(1) <a href="https://github.com/FrictionalGames/AmnesiaTheDarkDescent" rel="nofollow">https://github.com/FrictionalGames/AmnesiaTheDarkDescent</a>
(2) <a href="https://github.com/NoelFB/Celeste" rel="nofollow">https://github.com/NoelFB/Celeste</a>