There is no official native PC version of Silent Hill: Origins
It is not available for purchase on digital storefronts like Steam or Epic Games Store. It is considered "abandonware" by many in the community, though it is still legally owned by Konami. 2. How to Play on PC (The "Download" Methods) Since there is no native installer, you must use an to run the original console files (.ISO).
Any website claiming to offer a "Silent Hill Origins PC Setup.exe" or "Steam Key" is either distributing a virus, a fake launcher, or an unauthorized repack of the PS2/PSP data. Proceed with extreme caution.