Build releases across stable and unstable branches, plus the multiplayer and sandbox-setting changes servers run on.

The new Project Zomboid update is now available via the pre-release branch, as The Indie Stone changes release cadence for faster rollouts. Read the full story on PCGamesN: Project Zomboid finally has working ladders and useful crowbars, as its developer begins a new era for…
Project Zomboid is a trademark of The Indie Stone.
The Indie Stone renamed the Unstable branch to Pre-Release and put 42.22 on it, with ladders, crowbar forcing of locked doors and a batch of multiplayer fixes. Builds now sit there at least a week before reaching Stable.
For your guild
Server admins get at least a week's notice of every build from now on, so test mods on Pre-Release before Stable moves. Keep the main server on 42.21 and tell members not to opt in on their own, or they will not be able to join.
The Indie Stone says it officially supports only Lua modding for Project Zomboid. Java mods, loaders and frameworks are unsupported, may break with any update, and bug reports must reproduce without mods.
For your guild
If your server runs Java mods, tell members they sit outside the studio's support and can break on any update. Reproduce a bug on an unmodded save before filing it, and vet where each mod's code comes from.
Build 42.21 is now on the stable branch, after a week on the unstable beta. It targets zombie duplication and disappearing zombies, most visible on high-population servers.
For your guild
Server admins can update and re-enable any mods that broke on 42.20.4's Lua change. Hardcore groups on dense zombie settings get the most from this build, though the Indie Stone says a few duplication cases remain.
The Guild Post gathers the latest Project Zomboid news from The Indie Stone and the wider community into one page — patch notes, updates, and announcements as they publish, each linking back to the original source. Build releases across stable and unstable branches, plus the multiplayer and sandbox-setting changes servers run on.
For Project Zomboid guilds
Running a Project Zomboid guild? Guild Order gives your clan its own website: roster, events, and forums in one place.