What was the latest Project Zomboid update?

The latest Project Zomboid update is "Build 42.21 Stable Released", released on Sep 28, 2026. It is rated 2/5 (Minor) impact.

How often does Project Zomboid get updated?

Project Zomboid receives updates approximately every 14 days.

Where can I find Project Zomboid patch notes?

You can find all Project Zomboid patch notes, changelogs, and updates at patched.gg/games/project-zomboid. Each update includes an AI-generated summary, impact rating, and key changes. Official patch notes are published at https://store.steampowered.com/news/app/108600.

Project Zomboid

The Indie Stone

Survival

An isometric zombie survival RPG with hardcore survival mechanics, deep skill systems, and extensive multiplayer and modding support.

// PATCH HISTORY

2/5 MinorSep 28, 2026

Build 42.21 Stable Released

Zombie duplication and disappearing bugs are resolved in Build 42.21, which also improves XXL tree visibility and re-enables critical Lua methods for modders.

5/5 Game-ChangingJul 29, 2026

Build 42.20.0 Stable Released

Project Zomboid Build 42 hits Stable with a massive map overhaul, new XL tree types, and the introduction of '28 Minutes Later' and 'Top of the World' challenge modes.

2/5 MinorJul 9, 2026

NEXT STEPS

BETAProject Zomboid outlines the path to Build 42 Stable, including the upcoming 42.20 Unstable update featuring fixes for vehicle towing and multiplayer zombie culling.

3/5 ModerateJun 1, 2026

Build 42.19.0 Unstable Released

UNSTABLEController re-mapping and a new gamepad customization UI arrive alongside major multiplayer anti-cheat systems and performance optimizations for driving.

3/5 ModerateMay 11, 2026

Build 42.18.0 Unstable Released

UNSTABLEBuild 42.18.0 introduces new weapon reload animations, an auto-pause accessibility option for map reading, and critical security fixes for multiplayer.

3/5 ModerateApr 20, 2026

Build 42.17.0 Unstable Released

UNSTABLENew skill-based VHS tapes added alongside a massive rebalance of occupation costs, trait values, and game mode difficulty settings.

3/5 ModerateApr 17, 2026

Location, Location

UNSTABLEBuild 42.17 adds new Sandbox starting locations across the Exclusion Zone and introduces skill-boosting VHS tapes for previously practice-only skills.

2/5 MinorApr 8, 2026

Patching a Zero Day Exploit

Critical security update addressing 14 malicious mods in Build 42 and a separate vulnerability fix for Build 41.

2/5 MinorApr 8, 2026

Stable(41.78.19) + UNSTABLE(42.16.3) Hotfixes Released

Critical security vulnerability updates for Stable and Unstable branches alongside a Server Browser exception fix for the Unstable build.

2/5 MinorApr 8, 2026

42.16.2 UNSTABLE Hotfix Released

UNSTABLEMajor gamepad and control fixes including the ability to move while the inventory is open and resolved vehicle interaction conflicts.

2/5 MinorApr 2, 2026

42.16.1 UNSTABLE Hotfix Released

Park Ranger trait exploit fixed alongside critical multiplayer stability and server browser privacy updates.

5/5 Game-ChangingMar 31, 2026

Build 42.16.0 Unstable Released

Build 42.16.0 introduces a massive overhaul to Occupations and Traits, a complete Tailoring skill rework, and significant firearm adjustments alongside critical multiplayer DDOS protection.

3/5 ModerateMar 18, 2026

Important Security Updates

Project Zomboid releases critical security patches for Build 41 and 42 to address mod-related vulnerabilities, resulting in the removal of legacy game versions.

2/5 MinorMar 11, 2026

42.15.2 UNSTABLE HOTFIX Released

Critical fix for players with non-ASCII usernames unable to load the game, plus fixes for animal movement and mod data packets.

1/5 TrivialMar 10, 2026

42.15.1 BETA HOTFIX Released

Project Zomboid hotfix 42.15.1 resolves a critical loading error for players with non-ASCII characters in their usernames.

4/5 SignificantMar 9, 2026

SOME NEW THINGS

Build 42.15 introduces six new firearms, a complete overhaul of game modes including the addition of 'Extinction' with Sprinters, and significant buffs to tool durability.

4/5 SignificantMar 9, 2026

Build 42.15.0 Unstable Released

Build 42.15.0 introduces five revamped game modes including the 'Lore Canon' Apocalypse mode and six new firearms, alongside a critical security patch and massive balance overhauls.

2/5 MinorFeb 18, 2026

42.14.1 BETA HOTFIX Released

Critical fixes for players getting stuck in vehicles and unintended zombie attraction ranges, alongside multiplayer stability improvements.

4/5 SignificantFeb 16, 2026

Build 42.14.0 Unstable Released

Build 42.14.0 introduces a massive ammunition overhaul replacing .223 with 5.56, expands sitting mechanics to toilets and hay bales, and delivers a huge sweep of multiplayer stability fixes and survival balance adjustments.

3/5 ModerateJan 19, 2026

42.13.2 UNSTABLE HOTFIX Released

Project Zomboid hotfix 42.13.2 resolves critical zombie migration issues, enables multiplayer plastering, and fixes broken body temperature mechanics.

3/5 ModerateDec 18, 2025

42.13.1 BETA HOTFIX Released

Critical hotfix for Project Zomboid Build 42 Beta addressing severe multiplayer stutters, broken loot respawning, and zombie tracking issues.

5/5 Game-ChangingDec 11, 2025

Unstable 42 MP Released

Multiplayer support arrives in Project Zomboid Build 42.13 alongside firearm targeting improvements and a realistic interior lighting overhaul.

4/5 SignificantDec 11, 2025

Build 42.13.0 UNSTABLE Multiplayer Released

Build 42.13.0 introduces the highly anticipated Multiplayer stress test alongside a massive overhaul to inventory interactions, allowing players to equip clothing while walking and use double-click shortcuts for bandages and reading.

Quick Stats

Last update: Sep 28, 2026
Platforms: pc, mac

Official Source

View official patch notes