While not officially supported, some community workarounds exist for those using repacked versions: The Original .exe Swap
The Shadow War: Analyzing the Ecosystem of "Hitman 3," the Simple Mod Framework, and the Repack Scene hitman 3 simple mod framework crack repacked
It tells the story of how a brilliant modding tool (the Framework) was shackled by DRM, necessitating a controversial technical liberation (the Crack), which was then packaged for mass consumption (the Repack). It demonstrates that for a dedicated subset of players, the ability to modify their single-player experience is paramount—paramount enough to venture into the grey areas of software cracking. As the industry moves further toward cloud-based and subscription models, this tug-of-war between corporate control and community modification is destined to become even more complex, making the Hitman 3 saga a prescient case study for the future of PC gaming. If you're interested in modding Hitman 3 legitimately:
If you're interested in modding Hitman 3 legitimately: While not officially supported