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Unofficial fan guide · Project Zomboid Build 42 (42.20)

Build 42 Handbook

Every recipe, every crop, every fix — the stable Build 42 guide verified on patch 42.20.

Browse the database Open the guides
July 29, 2026 (Build 42)
Stable release
42.20.2
Current version
$24.99 (Steam)
Price
Windows · macOS · Linux
Platforms

Explore

Jump straight into the data

The biggest catalogs — one click from here.

Build 42 vs Build 41 — Complete Change List for 42.20.4

Build 42 vs Build 41 — Complete Change List for 42.20.4

Every major Build 42 change vs Build 41: new skills, moodles, blacksmithing, animals, map, loot, com…

 Build 42 Dedicated Server — SteamCMD Setup, Port Forwarding, 254-Player Cap & RAM

Build 42 Dedicated Server — SteamCMD Setup, Port Forwarding, 254-Player Cap & RAM

How to set up a Project Zomboid Build 42 dedicated server on 42.20.4 — SteamCMD (app 380870), UDP po…

 Build 42 Error Fixes — console.txt Triage for 42.20.4

Build 42 Error Fixes — console.txt Triage for 42.20.4

Fix 'unexpected error occurred,' Loading Map hangs, loadstring errors, crashes, and corrupt saves in…

 Build 42 Mods Guide — B42 Compatibility, Best Workshop Mods & Installation

Build 42 Mods Guide — B42 Compatibility, Best Workshop Mods & Installation

Project Zomboid Build 42 mods guide: why B41 mods break, checking 42.20.4 Workshop compatibility, th…

 Build 42 Multiplayer Guide — Playing With Friends on 42.20.4

Build 42 Multiplayer Guide — Playing With Friends on 42.20.4

Project Zomboid Build 42 multiplayer guide: how to play co-op with friends on 42.20.4, host your own…

Most opened

What players look up most

The pages reached for again and again.

Build 42 vs Build 41 — Complete Change List for 42.20.4

Every major Build 42 change vs Build 41: new skills, moodles, blacksmithing, animals, map,…

Build 42 Dedicated Server — SteamCMD Setup, Port Forwarding, 254-Player Cap & RAM

How to set up a Project Zomboid Build 42 dedicated server on 42.20.4 — SteamCMD (app 38087…

Build 42 Error Fixes — console.txt Triage for 42.20.4

Fix 'unexpected error occurred,' Loading Map hangs, loadstring errors, crashes, and corrup…

Build 42 Mods Guide — B42 Compatibility, Best Workshop Mods & Installation

Project Zomboid Build 42 mods guide: why B41 mods break, checking 42.20.4 Workshop compati…

Tools

Plan with the tools

Interactive planners and calculators built on real data.

Build 42 vs Build 41 — Complete Change List for 42.20.4

Every major Build 42 change vs Build 41: new skills, moodles, blacksmithing, animals, map,…

Build 42 Dedicated Server — SteamCMD Setup, Port Forwarding, 254-Player Cap & RAM

How to set up a Project Zomboid Build 42 dedicated server on 42.20.4 — SteamCMD (app 38087…

Build 42 Error Fixes — console.txt Triage for 42.20.4

Fix 'unexpected error occurred,' Loading Map hangs, loadstring errors, crashes, and corrup…

Build 42 Mods Guide — B42 Compatibility, Best Workshop Mods & Installation

Project Zomboid Build 42 mods guide: why B41 mods break, checking 42.20.4 Workshop compati…

Build 42 Multiplayer Guide — Playing With Friends on 42.20.4

Project Zomboid Build 42 multiplayer guide: how to play co-op with friends on 42.20.4, hos…

Build 42 Map Guide — The Three New Towns, Endless Wilderness, and Zombie Heat Maps

Build 42 map guide: Ekron, Irvington, Brandenburg POIs, the borderless wilderness, zombie …

Build 42 Challenge Modes — The Full 42.20 Lineup and How Each One Plays

Build 42 challenge modes on 42.20: Top of the World, 28 Seconds Later, returning A Really …

Build 42 Controls — Full Keyboard & Mouse Bindings Reference

Project Zomboid Build 42 keyboard and mouse controls: movement, combat, inventory, craftin…

Build 42 Game Modes — Every Preset Explained, From Apocalypse to Custom

Project Zomboid Build 42 game modes explained: Apocalypse, Survivor, Builder and the chall…

The database

Every guide in the game

Searchable, filterable catalogs.

map

3

Every map guide — Build 42 map guide: Ekron, Irvington, Brandenburg POIs, the borderless wilderness, zombie …

multiplayer

2

Every multiplayer guide — How to set up a Project Zomboid Build 42 dedicated server on 42.20.4 — SteamCMD (app 38087…

traits

2

Every traits guide — Build 42 traits ranked: S/A/B tiers for positives, which negatives are free points vs run-…

farming

2

Every farming guide — Interactive Project Zomboid Build 42 crop calendar: pick any month and see every crop you …

first-week

2

Every first-week guide — Interactive Project Zomboid Build 42 first-week checklist: tick off backpack, weapon, safe…

changes

1

Every changes guide — Every major Build 42 change vs Build 41: new skills, moodles, blacksmithing, animals, map,…

errors

1

Every errors guide — Fix 'unexpected error occurred,' Loading Map hangs, loadstring errors, crashes, and corrup…

mods

1

Every mods guide — Project Zomboid Build 42 mods guide: why B41 mods break, checking 42.20.4 Workshop compati…

challenges

1

Every challenges guide — Build 42 challenge modes on 42.20: Top of the World, 28 Seconds Later, returning A Really …

How it works

Mechanics & systems

Every system broken down piece by piece.

All guides
Combat & Attributes Skills & Leveling Stealth & Noise First Aid Corpse Sickness Moodles Base Building Generators Vehicles Basements & Bunkers Farming Fishing Foraging Animals Hunting & Tracking Recipes & Crafting Traits Tier List Challenge Modes Starting Locations Louisville

Reference

Game reference

The complete taxonomy.

Build 42 vs Build 41 — Complete Change List for 42.20.4 Build 42 Dedicated Server — SteamCMD Setup, Port Forwarding, 254-Player Cap & RAM Build 42 Error Fixes — console.txt Triage for 42.20.4 Build 42 Mods Guide — B42 Compatibility, Best Workshop Mods & Installation Build 42 Multiplayer Guide — Playing With Friends on 42.20.4 Build 42 Map Guide — The Three New Towns, Endless Wilderness, and Zombie Heat Maps Build 42 Challenge Modes — The Full 42.20 Lineup and How Each One Plays Build 42 Controls — Full Keyboard & Mouse Bindings Reference Build 42 Game Modes — Every Preset Explained, From Apocalypse to Custom Build 42 Loot Routes — Plan a Run That Brings You Back Alive Build 42 Louisville — Knox County's Endgame City, Reworked for 42.20 Build 42 New Locations — The 42.20 POIs You Haven't Explored Yet Build 42 Sandbox Settings — Configuration for Solo and Multiplayer Worlds Build 42 Starting Locations — Match Your Spawn Town to Your Build Build 42 Traits Tier List — S-Tier to Trap, With Point Costs Build 42 Base Building — Choosing, Securing & Running a Base on 42.20 Build 42 Character Planner — Occupation, Traits & Point Budget Build 42 Crop Calendar — Find What to Plant Any Month Build 42 First Aid Guide — Treating Wounds, Infection & Broken Bones on 42.20 Build 42 First Week Checklist — Interactive Survival List Build 42 Food Preservation — Freezer Math, Jarring, Drying Racks, and the Winter Pantry Build 42 Helicopter Event — Day 6-9 Warning, Hide or Drive, and the Pied Piper Tactic Build 42 Hunting & Tracking — Deer Routes, Traps, and the Leather Chain Stay on Build 41 — legacy41 Beta, Save & Mod Preservation on 42.20 Build 42 Stealth & Noise — Crouch, Lightfooted, Nimble, and What Attracts Zombies Build 42 System Requirements — Official Specs vs Real Usage on 42.20 Build 42 Animals — Livestock Systems Re-Checked on 42.20 Build 42 Underground — Basements, Bunkers, and Panic Rooms Explained Build 42 Blacksmithing — Furnaces, Forges, Anvils and the Full Progression Path Build 42 Combat — Muscle Strain, Discomfort, Body-Part Gunplay, and Explosives Build 42 Cooking — Soups, Canning, Drying Racks, and the Post-Fridge Plan Build 42 Corpse Sickness — How Miasma Works and How to Stay Safe Build 42 Farming — Full Crop Table and Mechanics Verified on 42.20 Build 42 First Week — Day-by-Day Plan Verified on 42.20 Build 42 Fishing — Every Fish, Spot, and Bait Rule Verified on 42.20 Build 42 Foraging — Production Materials, Biomes, and Weather Windows Build 42 Generators — All Four Variants, Fuel Math, and Placement Rules Build 41 to Build 42 Migration — Saves, Mods, and Settings Build 42 Moodles — Every New Status Icon, What Triggers It, and How to Clear It Build 42 Occupations — The Six New Jobs and Every Starting Bonus Build 42 Recipes — Every Crafting Table Verified on 42.20 Build 42 Skill Leveling — Fastest XP Routes for Every New Skill Build 42 Traits — Every New Trait, What Was Removed, and Builds That Work Build 42 Vehicles — Work Vans, Trade Trucks, and What's in Every Trunk Build 42 Water and Power Shutoff — When It Happens and How to Outlast It

The game

What is Project Zomboid Build 42?

Build 42 is not an update — it is a different game wearing the same jacket. Build 41 saves and mods do not carry over, every skill tree was rebuilt, and the crafting, farming, fishing and animal systems were rewritten from scratch.

This site covers Build 42 stable (42.20) only. Every table here is re-verified against the current patch, and pages are dated so you always know which version you are reading about.

New here? Start with the first-week guide, then check the recipe tables — the single most-searched Build 42 topic — and the B41 migration checklist.

About the data

Every guide, recipe table and stat on this site is verified against the current Build 42 stable patch. Browse the changelog →