To fix this, you must limit the game to utilize a smaller, compatible amount of processing power:
The game's engine frequently stutters or crashes because it constantly polls for Human Interface Devices (HID) like mice, keyboards, and controllers . How to fix and play Prototype 2 on PC in 2025 prototype 2 lag fix work
💡 If you are using a controller and experiencing lag, try unplugging it and using a keyboard to see if the stutter disappears. If it does, the issue is definitely related to the HID-compliant device conflict mentioned above. To fix this, you must limit the game