Prototype 2 uses DirectX 10. On low-end Intel GPUs, DirectX 10 drivers are notoriously slow. translates DirectX 10 into Vulkan, which runs much faster on integrated graphics.
While does not have a standard internal configuration file for lowering graphics settings beyond what's in the menu, you can significantly improve performance on low-end PCs by using external mods, launch arguments, and system-level tweaks. 1. Configuration & Launch Arguments prototype 2 low end pc config file
Extract the ZIP contents into your game folder (where prototype2.exe is located). Prototype 2 uses DirectX 10