Modding Tutorials/Folder structure

In this tutorial you will explore Rimworld's folder structure.
=What you'll learn=
You'll learn what content folders starting from your RimWorld starting location have and what use they might have in modding.
=Base game folder structure=
* Mac users: Installing Mods details how to enter your Rimworld directory.
==The RimWorld****** root==
In your Rimworld install directory, you can find five folders, some text files and your RimWorld******.exe file:
 RimWorld*******/
 Data/
 Mods/
 MonoBleedingEdge/
 RimWorld******_Data/
 Source/
 Readme.txt
 RimWorld******.exe
 Version.txt
 ...
We will focus on the four main folders for modding:
* Data
* Mods
* RimWorld******_Data
* Source
Some of the files are pretty self explanatory; Readme.txt contains a readme, Version.txt contains the version string and the .exe starts the game. 
You don't need to bother about all the other files and directories to start your modding journey.
==The Data folder==
The Data folder contains a Core folder with most if not all XML files used by Rimworld:
 RimWorld******/
 Data/
 Core/
==The Mods folder==
Mods you download will be placed in the Mods folder:
 RimWorld******/
 Mods/
Each mod's folder may contain the following folders:
Folder 	Contents 	Description
About 	About.xml and Preview.png	These files are used in the in-game mods list. They contain some info about the mod and an unformatted text description.
Assemblies	Custom .DLL files 	Mods with custom C# code have a .DLL file in this folder.
Defs 	All defs 	All XML code is stored in this folder, usually further categorized in subfolders and -files.
Languages 	All translations 	Every language file contains a DefInjected folder with a translation for everything in the game.
Patches 	All patches 	All xpath PatchOperations are stored in this folder.
Sounds 	All sounds 	Even though the main game's sounds are stored in compressed resource files, mods might use a folder for them.
Source 	Assemblies' source code 	Mods with an Assemblies folder might store source code for the C# code in here.
Textures 	All textures 	The main game uses compressed resource files to store textures, but most mods store textures here.
==RimWorld******_Data folder==
This folder contains a few files which are important for the base game but not necessarily important for modding it:
 RimWorld******/
 RimWorld******_Data/
 Managed/
 Plugins
 Resources/
 level0
 mainData
 output_log.txt
 resources.assets
 resources.assets.resS
 sharedassets0.assets
 sharedassets1.assets
These files are; .DLL's which contain the game code, compressed resource files containing the game graphics and audio, several files automatically generated by Unity which contain settings and such, a copy of Mono and a Steamworks .DLL.
What you might at one point be interested in are the Managed/ folder and output_log.txt, which contain .DLL's required for writing custom C# code and a more detailed version of the game's debug log.
==Source folder==
This folder contains a small amount of the game's C# source code:
 RimWorld******/
 Source/
 RimWorld/
 Verse/
These can be seen as tiny examples someone might use to get started with C# modding.
Anyone interested in bigger chunks of the source code is better off decompiling it by themselves.
=Next up=
*Mod Folder Structure
Category:Modding tutorials