Running on modern hardware (Windows 10/11) usually requires more than just a download. Because the game was released in 2007, you will likely need community-made patches to ensure it works correctly:
The PC version is often the most sought-after because it is the "uncut" version of the game, featuring the original execution animations that were blurred or censored on consoles (PS2, PSP, and Wii). Installation and Technical Considerations Manhunt 2 Free Download
Platforms like MyAbandonware host the Windows version of the game. These sites preserve older software that is no longer being actively sold or supported by the original developer. Running on modern hardware (Windows 10/11) usually requires