[ltc5505]

Where could I find his code to take a look at? Is there a reputable source or should I just Google it?

[nickjj]

If you're going to go down memory lane, take a detour and read John Carmack's plan files.

It's a daily blog of progress / lessons learned on whatever he was working on during the listed years.

The whole archive is at: https://github.com/ESWAT/john-carmack-plan-archive/tree/mast...

The 1990s is when it was most active.

[doomlaser]

id Software has a public GitHub and many of their classics are open sourced (Doom, Quake, etc): https://github.com/id-Software/

[ltc5505]

Awesome, thank you for the link!

[rofo1]

Check out https://github.com/id-Software they've published a lot of things there.

I really liked reading DOOM's source code :)