You could debate this is a topic which should not be asked here, but I was intrigued on learning the RTA for this on PC but it seems like capturing gameplay will be an issue since its forced into full screen, is there a mod launcher or a way to play this game in windowed?

Since ILs came out and ive been dabbling in that, I personally record using OBS and LiveSplit. I actually can't see my timer until the run is over, but for ILs thats ok. For a run, you could try using DXWnd, which emulates windowed and works with timers.

Same as Tunkon

Yeah I use DXWnd, it's pretty easy to find and use

Thanks really appreciate that!