Is Cymon's games a known ressource? (now offline but archived) https://web.archive.org/web/20110625053556/http://cymonsgames.com/about/
they created (modern) C game code, partly also from classical type-in listings of the 70/80s (converted from BASIC etc)... the code of all games was archived on github https://github.com/cymonsgames/CymonsGames
they created (modern) C game code, partly also from classical type-in listings of the 70/80s (converted from BASIC etc)... the code of all games was archived on github https://github.com/cymonsgames/CymonsGames