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Game Updates

Browse a source-backed game update timeline without guessed dates, versions, or freshness labels.

This page keeps Rat Lab changes in one source-backed timeline. Each entry must describe a verified player-facing change and retain its supporting source IDs. Version labels and dates remain absent when the evidence does not prove them.

Verified update timeline

  1. 1

    Halloween event announced for November 2

    Verified

    Evil Science lists a Halloween event for Rat Lab starting November 2.

  2. 2

    Halloween weekend brings 15 free minutes

    Verified

    Join Rat Lab during Halloween weekend to receive 15 minutes of free time. The event is listed for October 31 through November 2.

    Changes

    • Joining during Halloween weekend grants 15 minutes of free time.
  3. 3

    Rat King update adds mechs and new tools

    Verified

    The Rat King update adds a throne-room role, four tiers of Rat Mechs, chamber permissions and daily time bonuses.

    Changes

    • Chamber permissions let you allow, bar or kick staff from your chamber.
    • Daily bonuses grant free minutes, with larger rewards for streaks.
    • The Rat King rules the throne room and can drag rats away in a cage.
    • Four tiers of Rat Mechs can be ridden and used to attack.
    • New tools include a Shock Collar, Gravity Gun, Freeze Ray and Robo Cats.
    • OP Mutation now has a cooldown.
  4. 4

    Cheese mutations, rat burrows and a donut mixer

    Verified

    The CHEESE event brings cheese mutations, a rat burrow and a donut mixer to Rat Lab. Its public event listing runs from October 10 through October 29.

    Changes

    • Cheese mutations, rat burrow and donut mixer.
  5. 5

    Secret 'idk but it will be good' event scheduled for October 11

    Verified

    Evil Science put a new-content event called 'idk but it will be good' on the calendar for October 11 through October 18. Everything about it is still teased as '???' — the only hint is that it's going to be EPIC.

    Changes

    • A new-content event runs October 11 to October 18, 2026
    • All details are still teased as '???'; the description only says 'it's gonna be EPIC!'
  6. 6

    CUSTOM CHAMBER + TIERS huge update is live

    Verified

    The HUGE UPDATE went live on October 2 and runs through November 1: build your own experiment chamber, rank up Scientist, Police or Rat tiers to unlock OP items, and explore the new Police Dungeon.

    Changes

    • Customizable Chambers: build your own experiment room with machines and power buttons
    • Tiers: rank up as a Scientist, Police or Rat to unlock OP items
    • Police Dungeon: 10 machines (Washing Machine, Microwave, Hydraulic Press, Grinder, Blender, Electric Chair and more), holding cells plus a sewer escape for rats
    • Gifting: gift game passes to friends
    • Settings: music and sound volume, plus Performance Mode
    • Lots of bug fixes and balance tweaks
  7. 7

    MASSIVE UPDATE announced for October 10

    Verified

    Evil Science has scheduled a MASSIVE UPDATE event for October 10, teasing a customizable scientist chamber, private rat burrows, and new mutations. Full details are still under wraps.

    Changes

    • A MASSIVE UPDATE event is scheduled for October 10, 2026 and runs through November 1
    • Teased content: a customizable scientist chamber, private rat burrows, and new mutations
  8. 8

    Lab Director role, Code Red lockdown and weapon dealers

    Verified

    Evil Science shipped a major update: the player with the most lab time becomes Lab Director, Code Red lockdowns add turrets and laser doors, and new Rat and Staff dealers sell weapons to both sides.

    Changes

    • Police can no longer spawn-kill rats.
    • OP mutations can no longer spawn-kill.
    • Added the Lab Director role: the player with the most time in the lab runs the place, with an own office, an electric chair, all Security and Science powers, and the ability to hand out bonuses.
    • Added Code Red lockdown events with turrets, laser doors and power boxes to repair.
    • Added a Rat Dealer selling a Rocket Launcher, Flamethrower and Grenades.
    • Added a Staff Dealer selling a Net Launcher, Dart Gun and Gas Grenades.
    • Rats can play a dance animation by typing /e dance.
  9. 9

    Roblox game record created

    Verified

    Roblox created this game's record on July 30, 2026.

What belongs in this timeline

  • Confirmed changes to gameplay, progression, rewards, or available content.
  • Conflicts marked honestly when accepted sources disagree.
  • Separate detail links only when the content plan has frozen that route.