Rimworld V1.4.3517 May 2026

: 1.4.3517 addressed several underlying issues in the C# and XML codebases to help modders keep their content compatible with the evolving 1.4 framework. Notable Features in the 1.4 Era

For players still running this specific version, it's generally recommended to update to the latest stable release (currently in the 1.5+ range) to benefit from even more significant performance overhauls and new content. Vanilla Apparel Expanded - Steam Workshop RimWorld v1.4.3517

: The introduction of toxic waste packs and the environmental hazards they create. RimWorld v1.4.3517

: This version improved game stability, specifically targeting performance issues that arose with the new pollution and tox mechanics introduced in the Biotech expansion. RimWorld v1.4.3517