Overview
If you’re randomly getting half or a quarter of your normal framerate, all you need to do is reload any save to fix it, assuming the frame drops were caused by this game bug and not your hardware.You can just F5(quicksave) → F9(quickload) if you haven’t saved recently.This can get particularly bad in Chapter 2 when entering or leaving certain areas, which appears to be the cause. I’d get stuck at 25 or 50 FPS everywhere, down from 100, load a save and be back at 100 until I come across the next bugged area transition.I put this in the “Configuration” and “Walkthrough” categories because this is probably a bug many people will experience in their playthroughs, and there isn’t a more relevant category.