A new path allows a colonist to become a mechanitor, capable of controlling a personal swarm of mechanoids. This comes at a cost: Pollution , a new environmental mechanic that poisons the land and triggers insectoid attacks. Major Quality of Life Overhauls

Even for players without the DLC, version 1.4 brought significant improvements to the base game: RimWorld - Biotech expansion and update 1.4 available now!

RimWorld 1.4: Biotech and the Evolution of the Rim RimWorld version 1.4.3558 represents a major milestone in the game’s development, coinciding with the massive . This update fundamentally shifts how you manage your colony, moving beyond simple survival to the long-term management of generations and the very genetic makeup of your pawns. Life, Genes, and Machines

Colonists can now have children naturally or through technology like growth vats. Raising them involves building nurseries and providing an education to mold their future traits.