Rimworld.v1.4.3531.rar May 2026

The 1.4 update (the "Biotech" era) was one of the most transformative in the game's history. It introduced:

Files labeled as Rimworld.v1.4.3531.rar are typically found on third-party file-sharing sites. For the safest and most stable experience, it is highly recommended to use the official RimWorld Website or Steam , which allow you to "roll back" to specific versions (like 1.4) via the "Betas" tab without risking malware from unverified archives. Rimworld.v1.4.3531.rar

A massive quality-of-life change that allowed shelves to hold up to three stacks of items per cell. Rimworld.v1.4.3531.rar

Added "Paint" options for buildings and expanded hair/skin color settings. Rimworld.v1.4.3531.rar