42.20.0|Jul 29, 2026
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Build 42.20.0 Stable Released

5/5 Game-Changing

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.

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Key Changes

  • 1Massive 'Map Glowup' overhaul with new tiles, buildings, and locations across the world
  • 2Two new Challenge Modes: '28 Minutes Later' and 'Top of the World'
  • 3Reworked and re-enabled server-side anti-cheat systems for multiplayer
  • 4Added XL and XXL tree types with increased wood loot yields
  • 5Significant reduction in time required to transfer large stacks of items
  • 6Increased Sandbox zombie deletion limit from 500 to 5000
  • 7Critical security patch for Builds 41 and 42.19 addressing a disclosed vulnerability
  • 8Rebalanced vehicle towing mechanics including trailer detachment
  • 9Fixed major issues with hypothermia damage and point-blank firearm accuracy
  • 10Added filter search functionality to Recipes and Media UI

All Changes

🗺️Map & Environment(5)

  • newWorld Map: Substantial overhaul of many areas across the map with new tiles, buildings, and locations
  • newTrees: Added XL and XXL tree types to worldgen biomes
  • buffTrees: Increased wood loot generated from cutting down Extra Large trees
  • newTrees: Added ability to hide XL tree overhang using right-click while driving or scouting
  • newContainers: Added various new room definitions and containers across a wide range of locations

🏆Challenge Modes(5)

  • new28 Minutes Later: Added '28 Minutes Later' challenge mode to the rotation
  • newTop of the World: Added 'Top of the World' challenge mode to the rotation
  • removeCabin in the Woods: Removed 'Cabin in the Woods' from the challenge rotation
  • changeChallenge Modes: Adjusted spawn coordinates for 'Winter is Coming' and 'A Really CDDA' modes
  • nerfA Really CDDA: Removed the ability to respawn in the 'A Really CDDA' challenge

👥Multiplayer & Anti-Cheat(7)

  • changeAnti-Cheat: Re-worked and re-enabled server-side anti-cheat systems
  • buffInventory: Reworked stackable item transfers to significantly reduce transfer time
  • newServer Options: Added 'Show coordinates' ServerOption to toggle coordinate visibility for all clients
  • newUI: Added ping values for each player in the Players and Users List tabs
  • newTrading: Added separate trading interfaces for each splitscreen player
  • fixAnti-Cheat: Fixed various exploits including item spawning via animal commands, modData, and foraging
  • fixZombies: Fixed zombie culling triggering incorrectly and causing population drops

⚖️Gameplay & Balance(5)

  • buffSandbox Options: Increased max limit for 'Zombie count before deletion' Sandbox option from 500 to 5000
  • buffButchering: Increased meat cuts gained from large animals when using the butcher hook
  • changeVehicles: Rebalanced vehicle speed and towing; trailers can now detach during sharp turns or high speed
  • nerfExtinction Mode: Adjusted WoundInfectionFactor from 1.0 to 2.0 in Extinction mode
  • fixHealth: Fixed hypothermia applying damage incorrectly and killing players too fast

🖥️UI & Visuals(4)

  • newUI: Updated the Main Menu artwork and added an epilepsy warning screen
  • newUI: Added filter search boxes to Discovered Recipes and Media UI
  • removeAudio: Main menu SFX has been temporarily disabled
  • removeUI: Removed the 'Unstable' warning message from the main menu

🐛Bug Fixes(6)

  • fixSecurity: Released a security patch addressing a disclosed vulnerability for Builds 41 and 42.19
  • fixStability: Fixed a rare crash occurring for users with certain AMD GPUs
  • fixStability: Fixed a crash affecting MacOS builds
  • fixCombat: Fixed point-blank shots missing due to muzzle position being inside the target
  • fixAnimals: Fixed animal stress jumping to 100% when near an active car engine
  • fixGeneral: Fixed over 50 additional minor bugs across multiplayer, crafting, and world generation

Summary

Build 42 Stable Release

This major update marks the transition of Build 42 to the Stable branch, featuring a comprehensive 'Map Glowup' with new locations, tiles, and buildings. Players will encounter massive XL and XXL tree types in updated biomes, providing more wood loot.

Gameplay & Multiplayer Overhaul

Two new challenge modes have been added to the rotation, while existing ones like 'A Really CDDA' received balance adjustments. Multiplayer sees a significant security boost with a reworked anti-cheat system and optimized item stack transfers. The update also includes a critical security patch for Build 41 and 42.19, addressing a responsibly disclosed vulnerability.

Technical Improvements

Extensive work has been done on controller support, performance optimizations for new map areas, and hundreds of bug fixes ranging from vehicle physics to animal husbandry systems.