: Refinements were made to the then-new security buildings, such as the Foam Turret (which suppresses fires) and the Rocketswarm Launcher (effective against large groups of unarmored enemies).
: The introduction of toxic waste packs and the environmental hazards they create. RimWorld v1.4.3517
: Core Biotech features that allowed players to engineer custom xenohumans and manage colony families. : Refinements were made to the then-new security