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Spiffo's Workshop is the home of Project Zomboid mods on Steam.

Terms & Conditions

By purchasing Project Zomboid, you are permitted to:

  • Change or distribute the base files or contents in any way you like, provided that those changes do not result in you making Project Zomboid available to play or download (this includes making it available open source), or are for the purposes of cheating, unauthorised hacking, exploits or griefing other people or are malicious or illegal in intent or practice.
  • Use art, music, video footage or other assets of Project Zomboid for creative purposes in any way you like providing the end result is related in some way to promoting Project Zomboid, is for non-commercial use only (unless we agreed otherwise with you) and states Project Zomboid as its influence and origin by supplying the following wording prominently with the assets: “Thanks to The Indie Stone for creating Project Zomboid, which made this possible. This is an unofficial fan production for non-commercial purposes made under the Indie Stone Terms [link to these terms]“

You are not permitted to:

  • Modify the base files of Project Zomboid to include malicious code or other naughtiness.
  • Distribute Project Zomboid yourself, or host its download. In order to ensure the game’s integrity we recommend it should only ever be downloaded from established portals on which we’ve placed it (e.g. Steam).

In terms of the modding of PZ, you also agree that:

  • The Indie Stone reserve the right to implement any features in the game irrespective of whether mods exist that accomplish the same goal.
  • PZ modders are solely responsible for their mod, including (but not limited to compliance with any hosting platforms (such as Steam Workshop). They are also responsible for obtaining third party consents for any third party materials in the mod. Legally, we have to ask that modders to ‘represent and warrant’ (i.e. promise legally) that their mod is their own original work and any third party contents are fully and properly licensed by the modder.
  • Creation of mods is subject to our modding guidelines, which may be updated from time to time with any technical requirements regarding how PZ mods must work.
  • Project Zomboid modders are free to receive monetary/gift donations from the players who use their releases, and appreciate the time and effort put into them. However having mods created exclusively for those who choose to donate (or separate ‘in-mod’ content and bonuses) is not allowed. Mod creators cannot sell modifications to Project Zomboid.

How to install/play mods

Mod menu

To get a full tutorial on how to install mods, see [RoboMat's tutorial on the forums].

To start a mod up, first make sure the mod is installed in the correct directory. Once you have done this, start up Project Zomboid. Once you get to the main menu, down at the bottom of the screen when you see "Survival" and "Sandbox" you will also find a menu option called Mods. Click on it, which will then lead you to the mod menu.

In there you should see the list of mods that you have installed. Double click on the mod you wish to start and a green tick should appear next to the mod. Next thing to do is shut down Project Zomboid and start it up again. Once started your mod should now be ready to go. Instructions on using the mod are usually contained in README's or information in the thread.

Current mods

Modding tutorials

Tutorial Author Last updated
Project Zomboid Modding Guide (WIP) Fenris Wolf July 27, 2019
Lua Events PZwiki November 27, 2021
Lua Events (v41.65) co` December 22, 2021
RoboMat's Tutorials RoboMat July 24, 2013
Java Scripting Guide Lemmy101 July 24, 2013

Javadoc reference to Project Zomboid codebase

Basic Lua language

Additional Modding Resources

Mapping tutorials

Main article: Mapping
Tutorial Author Last updated
The One Stop TileZed Mapping Shop RingoD123 January 30, 2017
How to Combine Map Mods RingoD123 June 11, 2017
Full list of current Room Definitions RingoD123 February 7, 2014
Making new room definitions RingoD123 June 10, 2017
Mapping Tutorial's and Videos Thuztor April 20, 2015
Mapping Tutorial's and Videos (Outdated) Thuztor September 12, 2017
VegMap to Testing Custom Map Cpt_Paradox January 28, 2017
Making rooms with the place wall tool, item spawns, ortho and more! Cpt_Paradox November 30, 2017
Sliding Glass Doors, New Textures, Here's How! Cpt_Paradox November 30, 2017
How to make a map Start to Finish Full Video Tutorial BlackBeard January 30, 2017
All player made Building Archives BlackBeard May 31, 2019
Custom texture packs and tile definitions EasyPickins June 5, 2014
Card's Tutorial for Terrain Generation Cardenaglo February 22, 2017
Video Tutorials mapping Atoxwarrior June 26, 2016

Mapping tools

File format

Mapping Resources


List of item parameters

Much of this information was supplied by forum member InnocentSam.

Parameter Name Effect / Description Example
Type Item-type, describes how the item behaves. Includes 'Food', 'Weapon', 'Drainable', 'Literature', 'Clothing' and 'Normal'. Food (steak)
Display Name The item's name as it appears displayed to the player. Axe (axe)
Icon The item's icon as it appears displayed to the player. This parameter looks inside "media/texturepacks/ui.txt" and will call any sprite with the prefix "Item_". Molotov (molotov cocktail)
Weight Item's weight, used for encumbrance. 0.1 (painkillers)
OtherHandRequire Requires a specified item to be held by the player in their second quick-slot before the item may be used. Lighter (molotov cocktail)
CanBarricade Whether the item may be used like the hammer to barricade doors and windows. Boolean (false or true)
Count The number of items which may ever be used in the game world. 8 (Ripped Sheets)
UseWhileEquipped Whether the item is used over time while it is equipped. Boolean (false or true)
UseDelta Numerical value associated with how quickly the item drains. 0.0009 (torch)
ReplaceOnUse Name of the item which replaces the current item after use. Pot (pot of soup)
IsCookable Whether the item can be cooked. Boolean (false or true)
MinutesToCook How many in-game minutes the item must be in an oven for it to cook. 50 (pot of soup)
MinutesToBurn Length of time the item must be in an oven for it to be burnt. Usually double the value of 'MinutesToCook'. 150 (steak)
HungerChange Value applied to player's current hunger points. Positive increases hunger. -20 (crisps)
DaysFresh How many days it takes for a food item to begin rotting. 2 (steak)
DaysTotallyRotten How many days it takes for a food item to become entirely rotten. 7 (carrots)
DangerousUncooked Whether the food item will negatively affect the player in an uncooked state. Boolean (false or true)
RequireInHandOrInventory Requires a specified item to be inside the player's inventory before the item may be used. CanOpener (canned soup)
Alcoholic Whether the item effects the player in a similar way to Whiskey Bottle. Boolean (false or true)
UseSelf Whether the item is consumed after use. Boolean (false or true)
MinAngle The angle that the weapon attacks, a value aprox. to 1 is going to need more accuracy with mouse than one nearer to -1. 0.88 (shotgun)
MinDamage Minimum damage the weapon will inflict. 0.7 (baseball bat)
MaxDamage Maximum damage the weapon may ever inflict. 1.0 (baseball bat)
MaxRange Maximum range the weapon is effective. 1.5 (spiked baseball bat)
MaxHitCount Maximum amount of enemies the weapon will hit at one time. 1 (hammer)
PhysicsObject Physics object used as a projectile. MolotovCocktail (molotov cocktail)
SwingAnim Name of animation which is ran when the weapon is fired/swung. Bat (baseball bat)
WeaponSprite Name of sprite, the image used to display the weapon. axe (axe)
DoorDamage Damage inflicted by the item on doors. 10 (spiked baseball bat)
MinimumSwingTime The time that takes between each swing. 15 (baseball bat)
SwingAmountBeforeImpact Requires more research. 0.2 (spiked baseball bat)
PushBackMod Distance that enemies are pushed back. 4.5 (wood planks)
KnockBackOnNoDeath Whether enemies are pushed back if they are not killed. Boolean (false or true)
SplatNumber Blood effects used when an enemy is injured by the weapon. 5 (shotgun)
SplatBloodOnNoDeath Whether an enemy injured by the weapon will bleed if they are not killed Boolean (false or true)
ImpactSound Name of sound used on impact. splat1 (axe)
SwingSound Name of sound used when firing/swinging weapon. shotgun (shotgun)
SoundVolume Defines the volume of a chosen sound. 40 (shotgun)
SoundRadius Radius in which the sound may be heard in the game world from it's point of origin. 50 (shotgun)
ToHitModifier Requires more research. 1.5 (shotgun)
NPCSoundBoost Amount that a sound is boosted when the weapon is fired by an NPC (Not player). 1.5 (shotgun)
RangeFalloff Requires more research. Boolean (false or true)
UseEndurance Whether the weapon causes exhaustion. Boolean (false or true)
ShareDamage Requires more research. Boolean (false or true)
AmmoType Item required to fire the weapon. ShotgunShells (shotgun)
Palettes Defines the clothing item's colors. Trousers_Blue/Trousers_Brown/Trousers_Grey/Trousers_White (trousers)
PalettesStart Defines the clothing item's palette prefix. Shirt_ (sweater)
BodyLocation Where the clothing item is worn. Bottoms (trousers)
SpriteName Defines the sprite displayed on the player. Shoes1 (shoes)
StressChange Value applied to player's current stress points. Positive makes the player become more stressed. -10 (newspaper)
BoredomChange Value applied to player's current boredom points. Positive increases player's boredom. -50 (book)