For the Definitive Edition , trainers are trickier. Because the 2020 remaster uses a different executable ( .exe ), many older trainers cause the game to crash. You will need to look for versions specifically updated for "DE."
This is the ugly truth. Most trainer websites are filled with pop-ups, fake "Download" buttons, and executable files that contain trojans. You are essentially giving a stranger kernel-level access to your PC to get infinite ammo. mafia 2 trainer
Disclaimer: This article is for informational purposes. Modifying game files violates the Terms of Service for some platforms. Always scan downloaded files with antivirus software. For the Definitive Edition , trainers are trickier