Build 37 is NOT the current version of Project Zomboid.
You will not find multiplayer servers running B37. You will not get Steam Workshop updates. You will not have Louisville, the new foraging system, or muscle strain.
Do not overwrite your Build 41/42 install. Always use the Steam Beta branch or a separate folder.
Build 37 solidified the connection between the starting towns. The updates to the map, particularly West Point and the rural highways connecting it to Muldraugh, were significant.
Steam stores the B37 install at:
SteamLibrary\steamapps\common\ProjectZomboid
If you want to keep Build 37 permanently (even when you swap back to B41), copy this entire folder to your desktop. Rename it ProjectZomboid_Build37. You can launch it directly via ProjectZomboid32.exe or ProjectZomboid64.exe — no Steam required after the initial download. project zomboid build 37 download updated
Download Project Zomboid Build 37 (Updated) if:
Do NOT download Build 37 if:
If you bought the game via GOG or directly from The Indie Stone, the process is slightly different. Build 37 is NOT the current version of Project Zomboid
If you own the game on Steam, downloading Build 37 is official, safe, and easy. You do not need to visit shady third-party sites. The developers have kept older versions accessible for mod support and legacy players.
How to downgrade to Build 37:
Note: The password for older betas is sometimes required. If Steam asks for one, check the official Project Zomboid forums or the PZ Discord, as they often provide the access codes for legacy branches. Build 37 solidified the connection between the starting
| Problem | Solution |
|---------|----------|
| “Missing Java Runtime” | B37 uses an embedded Java 8. Install Java 8 JRE manually. |
| Black screen on launch | Delete %UserProfile%\Zomboid (back up saves first). Corrupt settings file. |
| No sound | B37’s FMOD is older. Set audio quality to “Low” in options. |
| Multiplayer fails | B37 MP requires manual port forwarding (16261) and matching game versions. Not recommended. |
This is a famous Build 37 bug. Fix: The host must have Port 16261 open, and all players must disable Steam Cloud saves for Zomboid. Also, never reverse at high speed.