OK pututu, I gave this a shot with my 3785 card. Real quick test with a randomly selected voltage/clock combo of 800mV/1530MHz. Here is my result, successfully set and tested below 818mV:
UPDATE: I can set it to 793mV successfully, but 787mV setting results in the card automatically raising...
I played this game all the way through, searched for every secret, platformed ad nauseum. Uninstalled it when done. It wasn't as good as Doom 2016, but it wasn't trash either. Just different. No idea skins were even a thing for this game. With all the glory killing and scrambling for ammo...