Several years ago PCG reported on the early stages of a project by programmer James Lambert, who really loves the N64 and decided for the hell of it to make a version of Portal that runs on hardware first released in 1996.
Well, Lambert is clearly the type of chap who commits to something and then follows through, because he’s spent the time since then continually adding bits and bobs and now has something which, to my admittedly uneducated eyes, is the most impressive homebrew game I’ve ever seen.
Crazy what people can do with the N64 with modern knowledge. There is this German dude on YouTube who modded Mario 64 to run at 60fps on the console, the game normally only runs at around 20fps even with the C compile optimizations turned on, which Nintendo left off in the original, it rarely hits 30fps. Now he’s making his own full fledged mod for the game. https://youtu.be/t_rzYnXEQlE