Released on November 3, 2023, RimWorld version 1.4.3901 focused on technical stability, cross-expansion integration, and critical bug fixes, particularly addressing a Biotech DLC Steam ID issue. The update solidified features from the 1.4 lifecycle, including improved storage, painting, and new turret mechanics. For full details on this version, visit the RimWorld Wiki RimWorld Wiki Version/1.4.3901 - RimWorld Wiki
Biotech is the largest DLC and the reason version 1.4 exists.
Painting and Customization: You can now paint walls, floors, and furniture, allowing for much more aesthetic control over your base. Rimworld 1.4.3901 All DLCs
Painting & Customization: The ability to paint walls, floors, and furniture, giving players much more creative control over their base aesthetics.
The Shelf Revolution: Shelves were overhauled to hold up to three stacks of items per tile, drastically reducing the footprint of your storage rooms. Released on November 3, 2023, RimWorld version 1
They stood shivering on the Glass Sea—a vast, frozen ocean where the ice was so clear it looked like you were walking on air. The temperature was -40°C. This was not just a colony; it was a test of faith.
Starting Possessions: You can now customize the specific items and gear your colonists start with more deeply. Biotech (The Mechanoid & Genetics Expansion) Biotech is
To ensure your content is complete, check the "Mods" menu from the RimWorld main screen. A complete 1.4 setup will show:
Jin-ho, half-mad from psychic drain, orders a void provocation. He touches the monolith again. A flesh pit opens in the rec room. A Noctol crawls out — blind, weeping black fluid, but its touch melts plasteel.