I believe they are. I was assuming that the issue being dependent on me playing specific games would have ruled that possibility out. Would issues from a ground loop manifest itself specifically from the increased power draw from my PC from playing these games? My knowledge of electricity-induced audio issues is limited.Sounds like a ground loop. Is the computer on same power strip as the TV and receiver?
I might have to try booting to a clean Windows 10 install on external SSD to rule out the possibility it's some weird Windows glitch. I'm pretty adamant about figuring this out ASAP. My sound system is worth multitudes more than my PC. I was working my way through RDR 2 and Warzone is the game I play the most.