ZERO Sievert — patch notes and updates
Stored observation / content update:
Dated developer announcements recorded from Steam. Open the source for the complete update.
| Update | Date | Excerpt / source |
|---|---|---|
| AMA with CABO and UNDERDOG | 2026-05-01 | Hello everyone,We wanted to let you know that we’ll be doing an AMA on r/ZEROsievert on Wednesday 6th May at 2pm BST.Taking part will be Luca from CABO Studios and Giuseppe from Underdog!If you’ve got questions about Zero Sievert, Zero Sievert 2, multiplayer, or the future of the series, this will be a great chance to ask them.We hope to see you there! |
| Zero Sievert 2 is REAL!! | 2026-04-30 | Hello everyone, Before anything else, we want to say this clearly. Zero Sievert 1 is still a big focus for us, and we’re continuing to support and improve it while we work on what’s next. (As part of that, we’ve just released a new beta that includes a Russian translation!) With that said, today we’re excited to officially share that Zero Sievert 2 is in development! Watch the reveal trailer here For us, this is a chance to take everything we love about Zero Sievert and push it further. We want to build on what made the first game special, keep that addictive extraction loop at the heart of it, and crank up the tension and atmosphere even mor |
| Hotfix for the Hotfix | 2026-04-23 | Oops! 😓 We made a mistake with the previous build, and we’re really sorry if you were affected by the crash. The team worked quickly to get a hotfix out, and this should now be fixed. Patch Notes Fixed a crash on death. Really sorry about that! We were so excited to share the Controller Improvements and ✨Borderless Fullscreen✨, but we should have left this one cooking in beta for a little longer. |
| Gamepad quality of life patch and more bug fixes! | 2026-04-22 | Hello Hunters!We just published another hotfix, this one includes some important quality of life updates:Bug fixesBorderless fullscreen is now available: Hopefully this means less issues with alt-tabbing and gpu drivers, it's enabled by default on fresh installations but you may want to turn it on if you have existing settings. If you are one of the users experiencing issues with alt tabbing the game go and turn Borderless mode ON, tell us here in the comments or on Discord if this solved your issues. Fixed several potential crashesImproved gamepad controls and UI navigationMap markers can be placed and removed with just one button on control |
| Localization Hotfix | 2026-04-21 | Fixes characters in Spanish, Spanish LATAM, Brazillian Portuguese, German |
| Help Us Test the Next Update! | 2026-04-17 | ZERO Sievert – Test the Next Update!Our next update is FULL of content, fixes and train skins (more on that later...) and we want you to jump in early to put it through its paces.This update brings a mix of new threats, new content, and meaningful quality-of-life improvements to the Zone. From a new roaming presence in the Swamp, to expanded storage systems that make your bunker cleaner, more organised, and easier to manage, there’s plenty to discover both in and out of raids.We’ve also made a number of improvements to controls, progression, and overall usability, giving you more control over how you play, fight, and survive. If you would lik |
| It Is Happening... | 2026-03-19 | Hello Hunters!Our latest dev update video has just gone live! You can check it out below...While the reports of more emissions and ghoul sightings have been rolling in, we’ve been heads down, not just looking at weapons on paper, but getting hands-on. Testing ergonomics. Handling. The way different setups actually feel when you use them and not just how they look.All of this is feeding directly into improvements to weapon modding and how guns behave in your hands. We’ll walk you through what we’ve learned, what’s changing, and what it means for your loadouts going forward.We've also bee2&%& // EMERGENCY BROADCAST //#%2&%&"!2// PLEASE STAND BY |
| ZERO Sievert - March Hotfix | 2026-03-02 | Hello Hunters!We've just put live a hotfix which has a speculative fix for the crashes some of you have been experiencing. This one has been particularly difficult to reproduce, so as a starting point for tackling it, we've updated the Steam SDK which was.... just a few versions out of date...Update, jump in and let us know how it looks and feels. and most importantly...If you had the crash and it's fixed, let us know. And if you had the crash and it isn't fixed, let us know!Let us know in the comments or join the official ZERO Sievert Discord server and give @Ethan a shout and give him an update on the update.Any and all information you can |
| ZERO Sievert Christmas Update Is Live! | 2025-12-18 | 🎄 ZERO Sievert Christmas Update Is Live!The Christmas Event is back in ZERO Sievert! Jump into the Zone during the holidays to hunt for festive loot, upgraded airdrops, and new backpacks including drops from NPCs for the first time ever.🎒 NPCs now drop backpacks 🎁 9 brand-new backpacks added 🎄 Christmas airdrops guaranteed festive gearGood luck out there, and get Santa some milk!🎄 Christmas Event ReturnsThe holidays have arrived in the Zone once again.The Christmas Event is now enabled, bringing back festive loot and themed encounters.If you extract alive while carrying a Christmas Event item, it will be automatically added to your stash |
| The Rotking Update: Hotfix | 2025-11-14 | The Rotking Update: HotfixHello Hunters!Following the launch of The Rotking Update, we identified several stability issues that were causing unexpected crashes for some players. Thanks to your quick reports (and the log files you sent in), we were able to track these issues down and roll out a hotfix to address them.💬 A THANK YOU TO THE COMMUNITYA huge thank you to everyone who took the time to report issues and share logs — your feedback and support help us keep ZERO Sievert stable and improving with every update.If you continue to encounter any issues, please report them on the Steam Discussions or the official Discord so we can investigat |
| The Rotking Update | 2025-11-13 | ZERO Sievert presents The Rotking UpdateFace the Rotking. Master the Chemicals. Survive the Zone.This update brings some of the biggest additions yet to ZERO Sievert — new bosses, enemies, factions, perks, and gear — alongside dozens of quality-of-life improvements and fixes.Face off against the Rotking, uncover chemical secrets beneath the Swamp, and encounter a new Industrial Faction with powerful, unique equipment.All that, plus new ammunition types, perks, and smarter UI and sound systems make this update one of the most feature-packed yet.Let’s dive in. 💀 NEW MUTANTS & BOSSES🧬 RotfangA new threat stalks the Zone. The Rotfang is a twist |
| The Armoury Update | 2025-09-30 | WELCOME TO THE ARMOURYThis update expands your arsenal like never before. The Armoury Update introduces five brand-new weapons, a deadly new ammunition type, and a host of quality-of-life features designed to make every raid smoother and deadlier. We’ve also made tweaks to NPC behaviour, recoil, and world systems to ensure firefights feel sharper and more immersive.🔥 NEW WEAPONSThe Zone just got a whole lot louder. Five fresh firearms join the fight, each bringing unique firepower and tactical depth:Paiga 12 (12x70mm)A semi-automatic shotgun with blistering stopping power. Devastating at close range and perfect for clearing corridors, the Pa |
| The Shooting Range Update is LIVE - Update 1.2.19 | 2025-08-04 | ZERO Sievert — Patch NotesWELCOME TO THE RANGEThis patch introduces the long-requested Shooting Range, giving players a dedicated space to test weapons, experiment with builds, and sharpen their combat skills. We’ve also made meaningful improvements to the Prologue, enhancing the early-game experience, along with a range of UI, controller, and quality-of-life updates to keep ZERO Sievert running smoother than ever. Full details below...NEW: SHOOTING RANGEA long-requested feature is here: the Shooting Range, available immediately in the Bunker — no grind, no unlocks, just straight-up practice.🔧 Where to Find ItLocated in the main BunkerAccess |
| ZERO Sievert Community Screenshot Challenge | 2025-07-06 | Have you got what it takes to kill a butt-ton of monsters, mercenaries and everything in-between, AND have the guts to capture the evidence? If so, we like your style...You have one goal: Kill as much stuff as possible and show it off in a single screenshot,Deadline: July 11th at 11:59 PM (your local time) RULES OF ENGAGEMENT Use any game save you have, All dead stuff much be within your standard locked FOV, You can add indicators to show all of the dead things, but they must all be clearly visible (you can turn off grass to help), No mods, no cheats, no altered images (besides indicators should you wish). Keep it clean, SUBMIT YOUR RUNUpload |
| Our latest ZERO Sievert dev update is now live! | 2025-07-05 | Our latest ZERO Sievert Dev Update is LIVE!And it's a doozy... We broke the game, we fixed the game, we're still on sale AND we're kicking off yet a rather morbid community competition... Watch to find out more! Don't forget to subscribe! |
| Hotfix 1.2.13 | Patch notes | 2025-07-01 | What's that? Another update?! Damn right it is! Sure, it's because we broke stuff... but you can't say we just left the bag, can you...Again, a massive THANK YOU to everyone who let us know you were experiencing issues and provided extra info on just how they were effecting you. This really helped and allowed us to quickly identify and resolve the issues. Here's the few notes for this hotfix:Fixed an issue which caused the Prologue to crashFixed an issue that caused wolves to spawn out side of the map on the PrologueFixed an issue where players could die in the PrologueFixed multiple localization issuesThese fixes combined should further impr |
| Hotfix 1.2.12 | Patch notes - Steam Deck and Prologue Fixes | 2025-06-30 | That's right! We fixed the Steam Deck and Prologue issues we introduced with the latest update (sorry about that...)A massive THANK YOU to everyone who let us know you were experiencing issues and provided extra info on just how they were effecting you. This really helped and allowed us to quickly identify and resolve the issues. For those wanting the specifics, here's the few notes for this hotfix:Fixed an issue which prevented the game from loading correctly on Steam DeckFixed an issue where Steam Deck users were unable to use consumablesFixed an issue which caused the Prologue (tutorial) to crashThese fixes combined should immediately impr |
| Our Lowest Price EVER!!! ZERO Sievert's in the Steam Summer Sale | 2025-06-27 | Summer Starts Here with 25% Off ZERO Sievert in the Steam Summer Sale! The summer sun is blazing over Zakov, and so is the perfect chance to jump into the intense, post-apocalyptic world of ZERO Sievert, now 25% off (Our lowest price yet!) during the Steam Summer Sale! Explore procedurally generated maps, brave deadly anomalies, and scavenge your way to survival in this gripping top-down extraction shooter. Sunburn and ice cream stains are the least of your worries! Good news for those looking to touch grass this summer, the recent release of patch 1.2.4 has made Zero Sievert even better on Steam Deck! And if you're looking for even more digi |
| NEW UPDATE IS LIVE - The Prologue Update (1.2.4) | 2025-06-26 | THE PROLOGUE UPDATE IS LIVE - (Update 1.2.4)Buckle up Hunters, because The Prologue Update is here!This update is packed with game-changing upgrades that will level up your entire experience. From smoother menus to smarter systems, we’ve supercharged everything to make your journey more intuitive immersive and downright fun. Let’s jump into the highlights.New Game Flow and Difficulty Presets Added new Difficulty Setting flow with a redesigned selection processDifficulty Preset selection updated so that selecting any difficulty other than "Custom” now proceeds directly to the next page. And selecting “Custom” opens the existing Difficulty Modi |
| Zero Sievert | Community Speedrun Challenge: #OrelRun | 2025-05-15 | 🏃♂️ Zero Sievert Community Speedrun Challenge: #OrelRun Rules 🏃♂️ It’s time to load your mags, trust your instincts, and move fast—because this challenge isn’t for the faint of heart. In the radioactive ruins of Zero Sievert, only the quickest and sharpest survive. Your mission: kill Orel as fast as possible from a fresh save. You’ve got until June 13th to prove your skill, earn exclusive merch, and claim your place at the top of the leaderboard. But before you dive in guns blazing, read the rules below carefully—one mistake could disqualify your run. 🏁Orel Run Speedrun Rules Start Fresh - Begin from a brand-new save. Any difficulty is a |