Rimworld V1.4.3517 [SAFE]

: 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).

: Significant upgrades to the search bar functionality in various menus, making it easier to find specific items in large stockpiles. RimWorld v1.4.3517

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 : Refinements were made to the then-new security

: Core Biotech features that allowed players to engineer custom xenohumans and manage colony families. Vanilla Apparel Expanded - Steam Workshop : Core

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

: 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