Unlike later builds, you could disassemble and re-assemble the same wall frame infinitely for XP. Developers patched this in Build 40, but Build 39 still allows the exploit.
The defining feature of Build 39 was the introduction of fully functional vehicles. This wasn't just a movement speed buff; it added several layers of mechanics: project zomboid build 39 work
The engine received major "under-the-hood" work to handle map streaming at higher speeds, including garbage collection improvements and UI framerate changes to keep the experience smooth while driving. Conclusion Unlike later builds, you could disassemble and re-assemble
If you take one piece of advice from this guide: The saw is mightier than the shotgun. Keep working, survivor. Winter is coming, but in Build 39, winter is only 150 logs away from a warm cabin. Unlike later builds