ZERO Sievert presents The Rotking Update
[h3]
Face the Rotking. Master the Chemicals. Survive the Zone.[/h3][p]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.[/p][p]Face off against the
Rotking, uncover
chemical secrets beneath the Swamp, and encounter a new
Industrial Faction with powerful, unique equipment.[/p][p]All that, plus new ammunition types, perks, and smarter UI and sound systems make this update one of the most feature-packed yet.[/p][p]Let’s dive in.
[dynamiclink][/dynamiclink][/p][h2]💀 NEW MUTANTS & BOSSES[/h2][p][/p][h3]🧬
Rotfang[/h3][p]A new threat stalks the Zone. The Rotfang is a twisted mutant born from chemical corruption, bringing new challenges to deep-zone expeditions.[/p][p][/p][h3]👑
Rotking[/h3][p]A terrifying new boss emerges from the sewers:[/p]
- [p]Wields a unique weapon and armor, both infused with chemical properties.[/p]
- [p]Armor Passive Effect: Standing on chemical anomalies restores HP.[/p]
- [p]Pairs perfectly with the new Chemical Grenade, offering deadly combat synergies.[/p]
[p][/p][h2]💣 NEW WEAPONRY & GEAR[/h2][p][/p][h3]🧪
Chemical Grenade[/h3][p]A deadly new tool of chaos. On impact, it spawns
temporary chemical anomalies on the ground, dealing area damage over time and opening up creative tactical options.[/p][p][/p][h3]🧰
Rotking’s Loot & Questline[/h3][p]After completing
“The Crystal”, a new quest —
“Chemical Documents” — sends you back into the sewers to confront the Rotking.
Defeat him and recover critical intel to
unlock the crafting recipe for Chemical Grenades.[/p][p][/p][h2]⚙️ NEW FACTION:
THE INDUSTRIALS[/h2][p]A powerful new
end-game faction has appeared in the
Industrial Area, unlocked after completing
“The Bridge to Zakov.”Speak to the
Barman and select the new dialogue option,
“Any news?”, to begin your involvement.[/p][p][/p][h3]Faction Gear[/h3]
- [p]Standard Faction Armor: 15% chance to deflect bullets — includes VFX and SFX.[/p]
- [p]Boss Armor: Deflected bullets heal 25% of their damage back to the wearer.[/p]
- [p]Unique Boss Weapon: A one-of-a-kind firearm wielded by the faction leader.[/p]
[p][/p][h2]🔫 NEW AMMUNITION TYPES[/h2]
- [p]5.45x39mm BP – Craftable, high-penetration rounds.[/p]
- [p]5.45x39mm Horizon – Exclusive to the new Horizon Boss.[/p]
- [p]7.62x25mm Chemical – Craftable after completing “Chemical Documents.” Dropped only by the Rotking.[/p]
[p][/p][h2]🧠 NEW PERKS & BALANCE CHANGES[/h2][p][/p][h3]
New Perks[/h3]
- [p]Rolling Start (Pistols, SMGs, Shotguns): After standing still for 1 second, gain +30% movement speed for 2 seconds.[/p]
- [p]Point Blank (Pistols, SMGs, Shotguns): Shots inside effective range have a +20% armor penetration chance on full hits.[/p]
- [p]Sticky Fingers (Hunter): Find 5x more Roubles in loot.[/p]
[p][/p][h3]
Updated Perks[/h3]
- [p]Grenade Expert: Now grants immunity to flash grenades and your own grenades.[/p]
- [p]Phantom Bullets (SMGs): Level requirement reduced from 15 → 11.[/p]
- [p]Point Blank: Adjusted behavior — now triggers on full hits instead of crosshair color indicator.[/p]
[p][/p][h2]🧩 QUALITY OF LIFE IMPROVEMENTS[/h2]
- [p]Ear Ring Volume Slider: Control the volume of grenade ringing effects separately.[/p]
- [p]Ammo Type Indicator: Easily see which ammo type your weapon is currently using.[/p]
- [p]Improved Item Tooltip: Now shows how many of that item you own in your bunker stash.[/p]
- [p]ESC Key Behavior: Consistently returns to the previous menu when navigating settings.[/p]
- [p]UI for Active Injectors: Cleaner, clearer visualization of currently active injectors.[/p]
- [p]Rain Sound Fix: Rain audio now correctly stops when the player moves indoors.[/p]
- [p]New Achievement: Steam achievement for completing the tutorial (unlocks automatically when [/p][p]the extraction countdown reaches 0).[/p]
[p][/p][h2]🏗️ QUESTS & WORLD CHANGES[/h2]
- [p]New Quest – “Chemical Documents”: Introduces the Rotking boss and Chemical Grenade crafting.[/p]
- [p]New Quest – “Base Building”: Unlocks after “Valuable Item.” Tasked with constructing your first base module.[/p]
- [p]Swamp Sewer Rework: Major layout and lighting improvements for smoother navigation and stronger atmosphere.[/p]
- [p]New Extraction Point: Added a new extraction zone in the south-west area of the sewer.[/p]
[p][/p][h2]🧱 FIXES & ADJUSTMENTS[/h2]
- [p]Fixed barman text “Any news?” not displaying correctly.[/p]
- [p]Fixed crash on chemical anomaly interactions.[/p]
- [p]Fixed solid wall misalignment during the “Machinery” quest.[/p]
- [p]Fixed crash caused by player’s own flashbang.[/p]
- [p]Grenade Expert perk flashbang immunity now works correctly.[/p]
- [p]Shotgun Slug ammo no longer has a minimum effective range limit.[/p]
- [p]Fixed lighting issues in the sewer.[/p]
- [p]Fixed dialogue display issues after “Revelations.”[/p]
- [p]TSU Scope can now be mounted on the Wintar BK.[/p]
[p][/p][h2]🌧️ LOCALIZATION[/h2]
- [p]General localization fixes and improvements across menus, quests, and tooltips.[/p]
[p][/p][p]As always, your feedback helps shape
ZERO Sievert.
Keep sharing your thoughts, builds, and stories with us — and we’ll see you in the Zone.[/p][p]
– The ZERO Sievert Dev Team[/p]