Prototype 2 's PC port is notorious for severe performance issues on modern systems, including extreme lag, stuttering, and crashing. These problems primarily stem from conflicts with modern multi-core processors and Human Interface Device (HID) drivers. Root Causes of Performance Degradation HID Driver Conflicts:
The most notorious cause of lag in Prototype 2 is the game engine's constant polling of USB HID devices (like keyboards, mice, and controllers). On modern systems with many peripheral drivers, this creates a massive processing loop that drops frame rates significantly. Common Community Fixes prototype 2 lag fix work