Searching for "v1.09" specifically often leads to sites like those mentioned on Reddit's CrackWatch . While these versions (like FitGirl) are popular for reduced file sizes—compressing the game from ~50GB down to ~20GB—they carry risks:
To get (v1.09) for free, your safest and only official option is if you already own the standard version of the game. Official Free Upgrade Mafia 3 Free Download Digital Deluxe Edition v1.09
NVIDIA GeForce GTX 660 or AMD Radeon HD7870 (2GB VRAM). Storage: 50 GB available space. Searching for "v1
Downloading from unverified third-party sources can expose your PC to malware or viruses. Mafia 3 Free Download Digital Deluxe Edition v1.09