Get a window into classic Mac dev with Glider source code
Classic Mac game dev John Calhoun has released the source code for four of his games -- Glider, Glider Pro, Glypha III, and Pararena -- onto GitHub. Those with an interest in 1990s Macintosh game development and retro code preservation should be sure to check out Calhoun's GitHub repository.
Calhoun has actually updated and re-released Glider for modern Macs and iOS devices, if you're interested in seeing what it looks like these days, too.
His games were beloved by Mac users of the time; one glance at this Paranena review will convince you.