If you are looking for "must-have" features to add via existing mods for this build, consider:
: RimWorld is built on Unity and coded in C# . Most "feature" development involves creating a C# library ( .dll ) that interacts with the game's Assembly-CSharp.dll .
: A library almost every feature mod uses to "patch" or modify existing game methods at runtime. Recommended QoL Features for 1.4 File: RimWorld.v1.4.3613.Incl.ALL.DLC.zip ...
: Ensure the folders for Royalty , Ideology , and Biotech are present in the Data directory. You can verify their status in the Mods menu within the game's main screen.
: Use a tool like dnSpy or ILSpy to view the game's source code to understand how existing systems (like pawns or world generation) function. Modding Tools : If you are looking for "must-have" features to
: Massive content additions that feel like official DLC.
: Improves pawn AI behavior for cleaning and hauling. Recommended QoL Features for 1
Depending on whether you are looking to set up this specific version or develop new content for it, here is how to proceed: Setting Up the Environment