Hey guys. I'm wanting to convert over to a MiSTer for my runs and I'm curious if it's accepted here, or if anyone knows of a game it's NOT accepted in.

I cannot speak for all NES boards, but here, it's definitely accepted. It's very accurate and additioanlly, it's "hardware emulation", so you don't even have to check "emulator" box while submitting, which concerns "software emulation".

Thank you for the response, that eases my concerns. My general understanding is it'll probably be accepted everywhere as it's at LEAST as accurate as most emulators if not better. I suppose if I find a run I want to do I should submit an early time and see how it goes.