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RimWorld
RimWorld
IndieSimulationStrategy
Ludeon Studios · Ludeon Studios·$34.99
Nov 15, 2022 · 46mo ago

Unstable build update 1.4.3548

AI summary1mo

Unstable build 1.4.3548 focuses on Xenotype editor integration, mech combat balancing, and various bug fixes for the Biotech and Ideology expansions.

Buffs4

  • Xenotype EditorThe Xenotype editor is now accessible directly from the ideoligion creation page for better workflow.Ideoligion page
  • Tesseron Beam GraserBeam:Tesseron beam grasers now have 50% armor penetration, making them more effective against armored targets.50% %
  • ChildrenSlave Suppression:Children now have a natural slave suppression offset, making them easier to manage as slaves when young.0%50% (age 3) to 0% (age 16) %
  • GeneralFixed a bug where pawns in gene extractors were incorrectly suspended.suspendedactive

Bug fixes3

  • Xenotype EditorNull genes are now automatically removed from custom xenotypes upon loading to prevent data corruption.null genes keptnull genes removed
  • Tesseron Beam GraserBeam:Fixed a bug where the Tesseron weapon did not correctly assign the pawn as the instigator of damage.nonepawn
  • ChildrenFixed the visual offset when children are carrying items.incorrectcorrect

Other changes6

  • Mechs
    • Threat Generation:Threat points from colony mechs now scale based on their combat power and colony wealth, making mech-heavy colonies face more appropriate challenges.staticscaled
    • Fixed an issue where newly gestated cleansweeper mechs used the incorrect texture.incorrectcorrect
  • Growth VatThe Essential precept now correctly lists the growth vat speed increase in the tooltip for better clarity.missingadded
  • General
    • Added build commands to easily switch between small shelves and standard shelves.
    • Legionaries now spawn with needle launchers (compact needle guns).needle launchers
    • Renamed memory genes to avoid confusion with the 'Great Memory' trait.terrible/great memoryslow/quick study

subjects affected (6)

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How did this patch land?
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official notes
RimWorld · Nov 15, 2022

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Patch history

see all 59

  1. Update 1.6.4850 releasedJun 8, 2026 · 2mo

    A small update focusing on stability, bug fixes for space/gravship mechanics, and wealth balancing for ancient bridges.

    +41
  2. Update 1.6.4630 releasedOct 31, 2025 · 10mo

    A small update focused on bug fixes, performance optimizations, and stability improvements, particularly regarding gravships, void structures, and pawn behaviors.

    +4
  3. Update 1.6.4543 releasedAug 6, 2025 · 12mo

    A small update focusing on bug fixes, stability improvements, and quality-of-life adjustments for quest shuttles, pathing, and the Archonexus ending.

    +6
  4. Update 1.6.4535 releasedJul 29, 2025 · 13mo

    Update 1.6.4535 focuses on fixing numerous bugs related to the Odyssey expansion, specifically regarding gravships, room vacuum, and corner-based interactions, alongside minor balance tweaks to psilocaps and genes.

    +31
  5. Update 1.6.4528 releasedJul 22, 2025 · 13mo

    Update 1.6.4528 focuses on bug fixes and performance optimizations for the Odyssey expansion, specifically targeting gravship mechanics, glowforest stability, and general game engine efficiency.

    +81
  6. Update 1.5.4104 releasedMay 24, 2024 · 27mo

    A small update focusing on Anomaly expansion refinements, ghoul behavior improvements, and a wide array of bug fixes across all expansions.

    +7
  7. Update 1.4.3704 releasedApr 19, 2023 · 40mo

    Update 1.4.3704 focuses on fixing colonist assignment resets during caravan travel and improving various UI tooltips and descriptions.

  8. Update 1.4.3682 releasedMar 28, 2023 · 41mo

    Update 1.4.3682 focuses on stability fixes, correcting pawn relationship logic, and refining mechanoid stagger behavior.

    +42

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