As part of the broader 1.4 update landscape, this version supported:
: Core Biotech features that allowed players to engineer custom xenohumans and manage colony families. 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. As part of the broader 1
: 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 RimWorld v1.4.3517
: The introduction of toxic waste packs and the environmental hazards they create.