To download the Project Zomboid Build 39 update, the most reliable method is through Steam. If you own the game, Steam automatically updates your client to the latest stable version. However, because Project Zomboid has moved significantly past Build 39 into the much more advanced Build 41 and beyond, you may need to use the Steam "Betas" tab to access older versions. By right-clicking the game in your library, selecting 'Properties,' and then 'Betas,' you can often find legacy builds listed for compatibility with older mods or hardware.
Improved fog and weather rendering to make driving in poor visibility highly dangerous.
Right-click on Project Zomboid and select Properties .
If you own the GOG version:
Project Zomboid , known as the Vehicles Build , was officially released to the stable branch on May 31, 2018