As of build 0.5.3, Zero Sievert features a growing number of keys used to unlock loot-rich areas, boss rooms, and quest locations. Whether you’re hunting safes, filing cabinets, or exclusive storage rooms, knowing what each key unlocks (and where to find it) is essential for efficient looting.

This guide details every current key, grouped by map, with loot breakdowns and tips for each location. Be aware: Zero Sievert is still in Early Access, so future updates may change key spawns or room contents.

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Forest Map Keys

Police Station Key

• Where to Get: 100% drop from Lazar, the Forest boss
• Use: Unlocks the Police Station in the town area (gray square cluster near center of map)
• Loot Inside:
  • Right Room: 2 med boxes, 2 safes, 3 ammo/attachment boxes
  • Left Room: 4 filing cabinets, 1 vending machine, 1 loot bag
• Note: Single-use key. Lazar wears Class 4 armor and is guarded by 4 Class 2 enemies.

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Makeshift Camp Keys

Mr. Junk’s Key

• Where to Get: Kill Mr. Junk
• Use: Unlocks his private stash behind the gate
• Loot: Scrap materials, propane, ammo components
• Warning: Killing Mr. Junk removes him as a trader—he does not respawn. The nearby robot turret will kill you if you try the door without the key.

Lab Keys

• Lab Entrance Key:
  • Get: From Laboratory Part 2 quest from Barman
  • Use: Required just to enter the lab
• Lab Storage Room Key:
  • Buy from: Barman
  • Use: Opens upper-right storage room
  • Loot: 5 safes, 6 filing cabinets, 2 med bags, ~7 attachment/ammo/electronics boxes
• Lab Main Room Key:
  • Get: Found on a dead body in the infestation room (after killing ghouls)
  • Use: Unlocks story-related room (top-left area)
  • Note: Contents not listed to avoid spoilers

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Industrial Zone Keys

Oil Factory Key Set

• Entrance: Found in the zone with roads shaped like an “S” curve and a side path
• Enemies: Blinks patrol the area
• Visibility: Dark—bring flashlight or NVGs

1. Oil Factory Personnel Key
   • Use: Unlocks first hallway door
2. Key to First Storage Room
   • Use: Opens room with 2 filing cabinets, 3 toolboxes, 4 attachment boxes
3. Key to Second Storage Room
   • Use: Opens room with 4 safes, 4 electronics boxes

These rooms are high-value but can be skipped if you’re avoiding high-risk zones like Industrial.

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Mall Map Keys

Gun Store Storage Room Key

• Get: 100% drop from Kiba, the mall boss
• Use: Opens the back room of the gun store
• Loot: Safes, weapon boxes, ammo crates, attachments
• Note: Single-use key

Tech Store Storage Room Key

• Use: Opens back room of the tech store (next to gun store)
• Loot: Electronics boxes, filing cabinets
• Valuables: Smartphones, CPUs, military circuits, consoles

Farki Jewelry Store Key

• Use: Unlocks the back room (left hallway near front entrance)
• Loot: Safes containing cash, gold, necklaces, fragrances, watches
• Bonus: Additional safes in unlocked side room

Mall Basement Office Key

• Get: Random drop from dead NPCs and containers
• Use: Unlocks office in the underground parking
• Loot: Filing cabinets (can include game stations, smartphones, and more), safes
• Danger: Ghouls, hunters, blinks, and bandits spawn frequently

Turbine Room Key

• Use: Opens turbine room in mall basement
• Loot: Toolboxes with crafting materials
• Note: Only worth it if you’re short on construction materials

Mall Underground Extraction Key

• Get: Also dropped by Kiba
• Use: Opens door to top-right hallway in basement; grants access to extract point
• Bonus: Reusable

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Sewer Area Key (Story-Related)

Sewer Gate Key

• Get: After completing the Crystal Quest (received in a container after being teleported)
• Use: Opens sewer gate to the mysterious NPC
• Location: Gray square on map; mid to bottom-right once inside
• Loot: Toolboxes, sheds with filing cabinets
• Enemies: Rats, spiders, ghouls, blinks, bandits, potentially a Big
• NPC Role: Non-functional for now, but likely to be quest-related in future updates

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Final Thoughts

Keys in Zero Sievert are often single-use, RNG-gated, or tied to quests and bosses. Learning where to find them and what they unlock will let you optimize your loot runs and increase your survivability by avoiding unnecessary backtracking or traps.

✅ Tip: Always bring NVGs or a flashlight for labs, factories, and basements.

Some keys are absolutely worth farming—like Kiba’s Gun Store key or the Lab Storage key—while others (like Mr. Junk’s) may be more situational.

As development continues and more keys are introduced, stay alert for updates—and always keep a safe stash for your high-value keys.

Good hunting!