This is what i found when i looked it up. It was initially released in the US an uncensored version (there's blood splatter and you are able to decapitate enemies, and cut off their limbs) but then they censored it. The only uncensored version is the one with starforce. Almost all digital download sites have the censored version.
Seems the GOG DRM-free version was supplied by UbiSoft with the scene release crack...and since the crack for the retail version was made from a European copy it censors the game in the US as well, as Europe always had the censored version. So the ONLY way to play it uncensored is to use the original 3 CD release and not crack it, which means Starforce on Windows 7.