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Project Zomboid is an open-ended zombie-infested sandbox. It asks one simple question – how will you die? Whether surviving in Knox County free-roam or controlling Indie Stone mascot Baldspot in his quest to save his injured wife Kate – death is always a certainty. Quite how long you manage to put it off is another matter…

Its not just Zombies that will kill but the environment. You can build and fortify to keep the horde at bay or always be on the move. Fight the cold during winter. Farm to spend less time making risky supply runs. Make to much noise with firearms and zombies will be attracted to your location, forming groups organically making it difficult to fight them off or pass by unnoticed. Over exert yourself and you might not be able to make a run for it when it counts. Depression, starvation, loneliness, illness, insanity, a lethal bite...

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Build 41 IWBUMS Beta out


Build 41 IWBUMS Beta out

The public ‘I Will Back Up My Save’ beta for the long-awaited Build 41 is now open for testing by the Project Zomboid community.


HOW?The IWBUMS beta is accessible to anyone who plays Project Zomboid. Right click Project Zomboid in your Steam library and hit “Properties”. Then, navigate to the betas tab and select the “iwillbackupmysave” branch from the dropdown menu.

Those who test IWBUMS beta builds must be aware that what they’re playing is a work in progress.

IF YOU HAVE ANY PROBLEMS - MAKE SURE ALL MODS ARE DISABLED -then please try verifying the steam local cache within those same options. If this doesn't work, try a full uninstall and reinstall (while also deleting or renaming the installation folder as well as your user folder in C:\Users\YourUsername\Zomboid). Sometimes Steam updates can be buggy with big updates.

The beta is put out for public consumption for player feedback and bug reports. Please direct gameplay feedback to our forum beta release thread, and bugs to this section of our forums.

For further details on what IWBUMS testing entails, please check here.

WHAT?Build 41 is the most fundamental and wide-ranging update that Project Zomboid has ever had. We intend it to be a stable foundation for us to build on for many years ahead. For this reason too, however, we anticipate a fairly long public beta while all the various issues presented to us by community testers are spotlit and remedied.

Some key features, primarily MP, are initially disabled in the IWBUMS beta build – and will be turned on during the testing process.

Build 41 currently contains:

  • New gameplay styles: Builder, Brawler and Survivor
  • More deadly ‘Survivor’ (Survival) gameplay balance – player can be dragged down by horde and feasted upon etc.
  • New survivor abilities: sitting, sneaking, sprinting, jogging, racking, reloading, climbing, fence-jumping, collapsing and much much more.
  • New combat, new weapons, new difficulty balance.
  • New character creation – many, many different new clothing options both on spawn and discoverable in the world as loot or on zombies.
  • New zombie behaviour: feasting on recent corpses, lolling against walls, falling over fences etc.
  • Blood system that progressively bloodies bodies and clothing of survivors and zombies
  • New injury system – movement and combat visibly hampered when injured. Lacerations now possible, an injury state that lies between bites and scratches.
  • Improved gunplay: green/red aiming outline, new guns, improved racking and reloading, increased gun loot spawn.
  • Zombie Death Scenes – zombies discovered in the situations in which people died. Prayer meetings, sports-viewing parties, survivor zeds wearing backpacks etc.
  • Situational zombie type/clothing and inventories – cop zeds in police station, firemen zeds in burnt buildings, Chef zeds in restaurant kitchens, bride and groom zeds at a wedding ceremony in church etc.
  • Clothing protection: different clothing provides different levels of protection from zombie attacks.
  • Visibly ripped and damaged clothing.
  • New Sims-style cutaway vision system.
  • Vehicle handling improvements, resizing and appearance tweaks.
  • Updated, remastered and improved Kentucky-themed soundtrack. Original music still in rotation, and also accessible through game options.
  • New SFX: weaponry, zombie moans etc.
  • New water visuals – including visible flow direction.
  • New puddle system during heavy rain.
  • Broken glass and related injuries.
  • Garage doors may be opened / closed and shake when hit.
  • New Challenge maps: Film Set and Kingsmouth Vacation Island
  • 3D Store Mannequins – can be dressed however you like
  • Working washing machines and driers
  • Server-side saving: MP save system now in a server-side database. Offline SP-side, also means no more lost cars via irl power outages.
  • New game cursor
  • New level-up sound, and tweaked levelling system.
  • Faint isometric aiming cursor that shows where you’re aiming in iso space.
  • New loot balance and loot balance system: houses and stores now have loot in the containers you would expect from real life – and not in a jumble.
  • Two tiers of loot priority – allowing for more realistic ‘filler’ loot amidst the more valuable gameplay items.
  • Many, many general fixes including remedies for: floating cars, farming issues, inaudible house alarms, erosion shrubs blocking vehicles, desensitized survivors being panicked by crawlers and much more.

Build 41 and is the first (biggest) step in our overall plan to bring more life, variety and activity to the Knox Event. From this build onwards we will be adding in (and improving) our existing AI work layer-by-layer.

Build 42, for example, will use the power of the Build 41 animations build to introduce animals and wildlife.

We will also be releasing AnimZed, our animation tool, to the community during the IWBUMS beta process – meaning that modders will receive a huge boost in what they can create within PZ.

WHAT NEXT?During the IWBUMS beta process for Build 41 the following features will be re-enabled and/or improved.

  • Multiplayer – alongside significant MP Networking improvements
  • Improved visual fidelity of survivor character and zombies
  • Further optimization to improve performance on both low and high end systems.
  • Sprinter Zeds
  • Fire visuals
  • Tutorial
  • Zombie skin appearance/decay
  • Ability to repair ripped clothing

WHAT ELSE?Due to the extent of engine and gameplay changes in Build 41, existing savegames will NOT be compatible.

At the time of the full build release, for those wishing to continue playing on old saves, a Steam beta branch of the current Build 40 will be available – and will continue to be available at all times.

This will be known as ‘PZ Classic’, and will also allow people to continue to play with their favourite mods until such a time as they are updated.

Click here for a sneak vision into the future beyond build 41!

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Build 38 has been released to the public, the details of which can be found below.

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Comments  (0 - 10 of 4,007)
kubisztal - - 6 comments

I saw a lot of zombie games, but this one took me in for much longer than others! Thanks a lot!

Reply Good karma Bad karma+3 votes
inhorinho - - 2 comments

this game is awelsome and fantastic survival zombie i like game

Reply Good karma Bad karma+3 votes
Bill_Chiper3 - - 39 comments

is this game any good?

Reply Good karma Bad karma+5 votes
aperture_tech - - 5 comments

It is probably the best zombie survival game out there. If the devs literally just stopped working on it today and left it as it is, you would still be able to have a massively enjoyable time with it. As is, it could be considered a complete game, by the icing on the cake is that it is not yet complete, and there will be more added in the future.

Reply Good karma Bad karma+2 votes
-.Eagle.- - - 124 comments

This is highly overrated. Especially considering the game is in development for like half a decade and still doesn't even have NPCs.

Reply Good karma Bad karma+4 votes
Pancake_Ninja132 - - 379 comments

This game has a nice style to it.

Reply Good karma Bad karma+2 votes
centerman2k - - 1 comments

I need to play this more and give it a fair chance.

Reply Good karma Bad karma+2 votes
Firepaw497 - - 14 comments

I played this game when it first came out. It's gotten much better.

Reply Good karma Bad karma+2 votes
windy_day - - 210 comments

Hello can anyone please help me out, how to spawn items in Project Zomboid? I cant find the command line! Please help. Where is the command line? I tried all leters from the keyboard nothing seems to come up. And I tried typing on the CMD background behind the game, nothing's happening. Oh please oh please help me.

Reply Good karma Bad karma0 votes
xweert123 - - 255 comments

You know what you should do? Play the game as it was meant to be played.

Reply Good karma Bad karma+3 votes
windy_day - - 210 comments

Yeah but I'm scared to go out of my house. And I dont want to play at newbies difficulty. xD Nvm I already have my own personal spawn mod that I have created. I just loved all my items in one backpack.

Reply Good karma Bad karma-1 votes
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Day 2 of Develop and I have yet to see any of England's massive snails. Disappointing.

Jul 12 2023 by theindiestone

RT @TheKnoxEvent: "We have been hesitant to discuss specifics, yes, but with reason. The Knox Event IS contained, but its panic and c… T.co

Jul 12 2023 by theindiestone

RT @TheKnoxEvent: "And for the rumor-mongering that has grown around the so-called 'Knox Event' At this time we have no reason to bel… T.co

Jul 12 2023 by theindiestone

Hello and welcome to day 2 of Develop where I arrive at the Hilton hours before the event starts and sit outside on… T.co

Jul 12 2023 by captainbinky

RT @TheKnoxEvent: "To this end I will be talking to the General and the CDC today. From which I will be able to provide more answers.… T.co

Jul 11 2023 by theindiestone

At #DevelopConf, if we're not talking work, talk to me about: Why I keep going to Develop despite never actually g… T.co

Jul 11 2023 by captainbinky

Welp that's brekkie done at the hotel. Overcast, chance of drizzle, cool breeze. I'll take this over the hotter tha… T.co

Jul 11 2023 by captainbinky

Join us on the car lot as we put the Mod Spotlight on MrDanny's vehicles! Projectzomboid.com

Jul 10 2023 by theindiestone

I have arrived :) T.co

Jul 10 2023 by captainbinky

Bored of being on a train now.

Jul 10 2023 by captainbinky