ZERO Sievert Patch Notes

Patch 2026-09-09 September 9, 2026

  • Trees, grass and decor are now drawn as solid or masked objects instead of soft see-through ones.
  • Foliage now uses a dithered pixel fade rather than going semi-transparent. This is the only cosmetic change in this pass. The intended look is the same. The performance is not.
  • Trees fade around you, your cursor and nearby NPCs without the old heavy per-tree check.
  • Foliage and decor are batched more like grass, so the game is doing less unique work per object.
  • Decor that needs collision stays in the world, but is no longer drawn when it does not need to be. Decor with no collision has been removed.
  • NPCs and weapons skip their draw work when they are off screen.
  • Cover and range checks for NPCs no longer run every frame. NPC-to-NPC target acquisition works the same way. How NPCs notice you and how aggro builds toward the player is unchanged.
  • Less hitching when a dense clump of trees comes on screen.
  • No performance drops on enemies you cannot see yet.
  • AI that still tracks you properly without effecting performance.
  • A small visual change to how trees part around the Hunter. If something looks off, tell us. This is the one place the optimisation is allowed to look different.
  • More easily modify weapon attachments and effect ranges.
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Patch 2026-08-20 August 20, 2026

  • Laptops should now correctly detect and use the discrete graphics card automatically. This resolves the common issue of the game running poorly on systems with integrated graphics unless you forced the high-performance GPU through Windows settings. No more external fiddling required.
  • Additional performance improvement: surface buffers for shaders are no longer constantly recreated when using non-integer resolution scaling.
  • Fixed a bug that caused overlapping icons.
  • Sprinting now always works as toggle by default when using a gamepad.
  • The sprint icon now only appears when sprint toggle is enabled.
  • The “Toggle Sprint” setting no longer affects gamepads. Toggle is now the default (and generally preferred) behaviour for controllers, so we expect this to have little to no impact for most players.
  • Items can disappear when using the sort feature. To reduce the chances of this, do not sort when your inventory is almost full and you have large items (taking up 4 slots or more)
  • 5.56x45 M856A1 ammo container can not be dropped to the ground and can only placed in stash
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Patch 2026-08-13 August 13, 2026

  • Added 5.56x45mm M856A1 ammunition.
  • Added dedicated M856A1 ammo boxes.
  • M856A1 has been fully integrated into the game's systems, including: Loot
  • NPC loadouts
  • Quest rewards
  • Added a new Collect interaction for Containers.
  • This makes it easier to retrieve stored items without having to manually manage every item inside.
  • Added quest markers for The Crystal.
  • Added quest markers for Outer Deity.
  • Improved difficulty menu selection visuals
  • Added Standard difficulty.
  • Rookie difficulty has been renamed to Relaxed.
  • Improved the difficulty selection screen to better communicate the differences between each difficulty.
  • Start Prologue
  • Start Main Game
  • Added an option for automatic ammo switching.
  • When enabled, your weapon will automatically switch to another available ammo type once the current type runs out.
  • Increased the frequency of Bolt Cutters appearing in the world.
  • Bolt Cutters can now be purchased from Mr. Junk.
  • Grenades now stack up to 4.
  • Reduced mine size.
  • Mines can now be assigned to quick slots.
  • Reduced deployment time.
  • Reduced fuse time.
  • Reduced weight.
  • Phantom is now more effective during off-screen combat, leading to a greater chance you’ll find him alive rather than already dead
  • Updated the loot found in Phantom's stash, giving you another reason to track him down.
  • Fixed inventory weight not updating correctly when equipping backpacks through Quick Move.
  • The weapon modification screen now properly supports taller attachments.
  • Added an option to automatically close the inventory screen in chests and stashes when taking damage.
  • The default sprint behaviour is now Hold to Sprint.
  • Shooting now cancels sprinting (instead of sprinting cancelling shooting), giving movement and combat a more responsive feel.
  • Added a Sprint status icon.
  • Added weapon and armour wear icons so you can more easily keep track of your equipment condition.
  • Numerous improvements to the HUD.
  • Improved cursor behaviour.
  • Improved gamepad support.
  • Improved interaction prompts.
  • Improved various menus and interface elements.
  • Settings menus are now scrollable where required.
  • Added additional difficulty and settings tooltips.
  • Improved the difficulty selection page, making the differences between settings more clearly visible.
  • Hidden unnecessary talk prompts for NPCs who don't currently have dialogue or tasks available.
  • Added audio barks for states including: Wounded
  • And other player conditions
  • Improved the tutorial flow.
  • Improved pacing.
  • Refined dialogue.
  • Improved the overall onboarding experience.
  • Updated the game's runtime to resolve several NVIDIA driver-related issues.
  • Missing localisation will now correctly fall back to English.
  • Bunker lights now correctly remain off after exiting the game.
  • Fixed the Weird Phenomena quest marker.
  • Fixed procedural quest objectives occasionally spawning outside the playable map.
  • Fixed building entrances causing door sprite changes.
  • Fixed issues with door and entry point positioning.
  • Fixed several inventory-related issues.
  • Fixed zero or negative quantity loot being saved to the stash or inventory. These invalid quantities are now removed when loading a save.
  • Fixed loot stack quantities changing incorrectly when merging stacks.
  • Fixed cursor issues occurring after changing resolution or display mode.
  • Fixed several scoped HUD overlay issues.
  • Fixed various interaction prompt issues.
  • Fixed death screen issues.
  • Fixed trader UI issues.
  • Fixed keybind display issues.
  • Fixed various menu and interface bugs.
  • Fixed various AI issues.
  • Fixed various additional gameplay bugs and edge cases.
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Patch 2026-06-04 June 4, 2026

## What changed **New Roaming Boss: Phantom** — A new boss enemy patrolls the Swamp map similar to Arman, equipped with Ghillie Suit armor and a modified N1o rifle for stealth gameplay. Killing Phantom drops Coordinates that reveal a hidden chest location on your map. **Containers System** — New storage containers can be crafted at the Bunker Crafting Bench to hold up to 99,999 of a single item type, supporting ammo, scrap materials, armor, food, meds, and weapons. Use the "Track" option while crafting to monitor required materials in the field. **Bunker Radio Feature** — Complete the new quest "Get Some Music" from the Barman to unlock a Bunker Radio with speakers for playing music tracks in your base. **Train Skins** — Six new cosmetic train skins are now available through the Conductor, unlocked by joining factions (Green Army, Crimson Corporation), reaching 450+ reputation (Scientist), completing quests (Watcher via "The Crystal"), finishing the game (End Game), or discovering the secret ending (Anomaly). ## Bug Fixes - **Image quality** — Fixed pixel shimmering for improved visuals - **Quest items** — Fixed an issue where certain quest items would fail to spawn ## Overall ZERO Sievert adds a challenging new Swamp boss, expanded storage and base customization, and cosmetic unlocks tied to progression milestones.
  • Added a new roaming boss to Swamp called Phantom.
  • Phantom actively patrols the map, similar to Arman, so you'll need to stay alert at all times.
  • Phantom is equipped with a unique loadout, including a Ghillie Suit armor designed for maximum concealment, and custom ghillie modifications for his N1o, enhancing stealth gameplay.
  • Once killed, Phantom drops Coordinates revealing a hidden chest location directly on your map.
  • Added containers to support a variety of items, including: all types of ammo, Scrap Ammo, Scrap Armor, Scrap Food, Scrap Material, Scrap Meds, and Scrap Weapon.
  • Each container can hold up to 99,999 of a single item, allowing for large-scale resource management.
  • To craft a container, head to your Crafting Bench in the Bunker and select the new 'Containers' option.
  • For easier crafting, tick the "Track" option for the Container you want to craft. This helps you know how many materials you need when out in the field.
  • Added a new quest "Get Some Music", given by the Barman after completing "Towards Makeshift Camp".
  • Completing this quest unlocks the brand new Bunker Radio feature.
  • Added a Bunker Radio and speakers which allow you to find and play music tracks in the Bunker.
  • Added a new train skin system, used by talking to the Conductor.
  • 6 new train skins available, each tied to specific achievements and progression paths:
  • Green Army - Join the Green Army.
  • Crimson Corporation - Join the Crimson Corporation.
  • Scientist - Reach 450+ reputation.
  • Watcher - Complete the quest "The Crystal" .
  • End Game - Finish the game with any ending.
  • Anomaly - Complete the game via the secret ending.
  • Improved image quality - fixed pixel shimmering.
  • Fixed an issue where certain quest items would fail to spawn.
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Patch 2026-04-23 April 23, 2026

## What changed - **Death crash** — fixed a crash that occurred when the player character died ## Bug Fixes - **Death sequence crash** — resolved the game crash that was triggered upon player death ## Overall The patch stabilizes the death sequence by eliminating a critical crash that was occurring when players were eliminated.
  • Fixed a crash on death.
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