1.6.4850|Jun 8, 2026
View on Steam↗Update 1.6.4850 released
2/5 Minor
Heavy bridges are now immune to explosion damage and ancient bridges have been added to prevent wealth spikes, alongside dozens of fixes for Biotech and Anomaly content.
Key Changes
- 1Heavy bridges are now immune to explosion damage
- 2Added Ancient Bridges with 0 market value to prevent ruin-based wealth spikes
- 3Fixed a critical bug where babies born during shuttle flights were deleted
- 4Fixed an issue where 'Deliver resources' jobs could cause pawns to stop working
- 5Unnatural corpses can no longer be destroyed by nutrient paste machines
- 6Fixed performance issues related to large numbers of unbuildable blueprints
- 7Ghouls can no longer be sent on caravans alone
- 8Fixed macOS modding issues related to non-Apple filesystems
- 9Siegers now correctly respect player blueprints
- 10Embryos can now be marked as forbidden
All Changes
🏗️Structures & Environment(7)
- buffHeavy bridges: Heavy bridges are now immune to explosion damage.
- newAncient bridges: Added ancient bridges and ancient heavy bridges with a market value of 0 to prevent wealth spikes from ruins over water.
- fixBridges: Fixed an issue where explosions were not correctly destroying regular bridges.
- fixWalls: Cancelling a wall blueprint that was replacing another wall no longer deletes existing wall attachments.
- fixLava: Volcanic debris lava can no longer spread to deep water.
- fixGravship: Gravship takeoff no longer leaves floating roofs on the launch map.
- fixPower nets: Buildings no longer remain connected to power nets on the previous map after a launch.
👥Colonists & Creatures(12)
- changeEmbryos: Embryos are now forbiddable.
- fixBabies: Fixed an issue where babies born during shuttle flights were deleted.
- fixGhouls: Ghouls can no longer go on caravans alone.
- fixGhouls: Ghouls now exit shuttles in a drafted state like other colonists.
- fixPawns: Fixed a bug where pawns would infinitely desire a looks-change if their ideoligion and genes clashed.
- fixLodgers: Fixed an issue where lodgers that were arrested and released were recruited for free.
- fixUnnatural corpses: Unnatural corpses can no longer be permanently destroyed by turning them into nutrient paste.
- fixSlaves: Slave terror now correctly checks more than just the region the slave is currently in.
- fixBabies: Babies born without a faction no longer have their xenotype randomized occasionally.
- fixVacsuits: Fixed an issue where pawns would attempt to remove their vacsuit in space if their policy didn't allow for it.
- fixMechanoids: Mechanoids no longer repair too fast when ticking at a lower rate.
- fixCreepjoiner: Fixed Creepjoiner body types.
📜Quests & Events(9)
- fixAncient danger: Fixed an issue where some ancient danger enemies were active before being unfogged.
- fixQuests: Shuttle crash rescue quests no longer generate with too few points to create an enemy threat.
- fixShuttle: Rescue shuttles can no longer land on and destroy the crashed shuttle they are meant to rescue.
- fixFleshmass heart: Fixed several issues involving the fleshmass heart and gravship jumps from maps with grav anchors.
- fixMonolith: Strange signal quests now correctly find a place for the monolith on full maps.
- fixDistress signal: Distress signal maps are now guaranteed to generate with a shard.
- fixAncient complex: Terminals are now guaranteed to spawn in ancient complex quests to prevent instant failure.
- fixQuests: Pilgrim quests no longer target maps without a reliquary.
- fixCultists: Cultists no longer get stuck after their ritual is interrupted.
⚙️Gameplay Systems(10)
- fixJobs: Fixed an issue where 'Deliver resources' jobs caused pawns to stop taking any jobs.
- fixWeapons: EMP rounds on unique weapons now correctly break low-shields.
- fixSiegers: Siegers now correctly respect player blueprints.
- fixDeathrest: Gravship jumps no longer interrupt deathrest.
- fixHolding platforms: Holding platforms minified by infestations no longer delete their contents.
- fixButcher yield: Butcher yield storyteller settings no longer affect the yield of 'make any stone blocks' bills.
- fixBiosculpter pods: Fixed an issue where quest lodgers could enter biosculpter pods via gizmos even when disabled.
- fixAI: Fixed AI inconsistencies when pawns move around blocking entities.
- fixBloodrage: Bloodrage hediff now scales correctly on pawns ticking at a lower rate.
- fixGolden Cube: Cube interest and withdrawal now behave correctly on pawns ticking at a lower rate.
💻Technical & Performance(6)
- fixPerformance: Fixed performance issues occurring when players had no home map but several non-home maps and no gravship.
- fixPerformance: Fixed performance issues caused by having a large number of unbuildable blueprints.
- fixmacOS: macOS installations on non-Apple filesystems no longer attempt to load generated '._' prefixed XML files.
- fixModding: Removed legacy back-compatibility code that was causing issues with modern mods.
- fixGod mode: Fixed an exception when hovering over certain buildings near the map edge in god mode.
- fixTechnical: Fixed an enumeration error with the joyous thought.
🎨Visuals & UI(8)
- changeRoyalty: Updated Royalty expansion preview images.
- changeCreative Content: Updated player creative content.
- fixWastepack atomizer: Wastepack atomizer sprites for west and east orientations have been flipped to the correct positions.
- fixUI: Fixed 'Cloudwatching' appearing in space instead of 'stargazing'.
- fixUI: Rectangle drag designators now display the actual number of cells in the rectangle rather than total designated cells on screen.
- fixPsilocap: Fixed incorrect psilocap graphics.
- fixArchean tree: Archean tree now correctly displays its snowy overlay.
- fixUI: Fixed several typos in text.
Summary
Update 1.6.4850 for RimWorld focuses on structural improvements and a massive sweep of bug fixes. Key highlights include making heavy bridges explosion-proof and introducing ancient bridge variants with zero market value to prevent unintended wealth spikes on ruin-heavy maps. The update also addresses critical issues with baby survival during shuttle flights, ghoul behavior, and performance bottlenecks related to blueprints and specific map configurations.