Patch notes

Every Project Zomboid version since 42.20, told in our own words, and since 42.21 the exact list of what changed in items, recipes, traits, skills, moodles and server options. We're on 42.21.

the summaries are ours; the official notes are linked on each version

42.21September 28, 2026StableFewer duplicated zombies and less intrusive treesThe first incremental update after Build 42 went stable, tested on the unstable branch for five days before release. It goes after zombies that vanished when you came back to an area and duplicated zombies online, makes XXL trees easier to see past and turns loadstring and loadstream back on for mods. The Indie Stone says a few duplication cases remain and are planned for the next update.first saved 42.20July 29, 2026StableBuild 42 goes stableThe first stable release of Build 42. Many areas of the map were redone with new buildings and places, forests gain extra-large trees and two new challenges arrive. Multiplayer gets its anti-cheat back along with a long list of desync and exploit fixes. Build 41 stays playable through the legacy41 branch on Steam.not compared4 hotfixes