The original game only supports 4:3 aspect ratios. Popular community scripts, such as ThirteenAG's Widescreen Fix, force the engine to render correctly at 1080p or 4K without stretching the user interface.
Modern operating systems like Windows 10 and Windows 11 require a few extra steps to run a 2002 CD-ROM image properly. Mafia The City of Lost Heaven -ISO- version download
Here are the safest, community-endorsed locations to find the "Mafia The City of Lost Heaven" ISO files online. The original game only supports 4:3 aspect ratios