[MOD REQUEST] FIX NPC AI/Physics being tied to FPS Above 60 FPS = Floating NPCs in cities and, I suspect, a lot of other physics related bugs, like getting stuck. You can easily "fix" it by lowering FPS to 60. Test it by using a frame limiter. If you see an NPC floating up in the air, just enable the limiter (60 or below) and the NPC will stop floating immediately. I bet it's the old HAVOK problem again.