When I bought Red Dead Redemption 2, I really couldn’t go beyond Chapter 1 because of my PS4 Pro fan noise. The fan noise was so high that I can’t focus at all even with the volume being high. When I searched online, most of the solutions were about cleaning the PS4 Pro by using a compressed air can and removing the dust. I went and tried that solution and it never worked. The issue was more complexed than that, so when I asked around. I was told that the first model of PS4 Pro has this common problem of fan noise. The reason is because the thermal paste dries up fast with the first model. The fix is simply removing and cleaning the dried thermal paste, and apply new one. The noise dropped by 60% and since then I started playing on my PS4 Pro. There are tons of guides that shows you how to replace the thermal paste on PS4 Pro. Check them out and try this solution if cleaning out doesn’t fix the issue.