Crusader Kings III
Crusader Kings III

Creating Your Own Mods (Basic)

Start creating Crusader Kings III mods by editing game files. Learn basic modifications to change mechanics and historical events. Begin your modding journey t.

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Crusader Kings III's robust modding tools allow you to delve deeper into the game's mechanics, alter historical events, or even introduce entirely new gameplay elements. For those new to modding, starting with simple modifications is the best approach. The game's modding tools are primarily file-based, meaning most changes are made by editing text files within specific game directories.

Essential Modding Tools & Concepts

  • Game Files: Crusader Kings III stores its game data in a series of folders, typically found within your Steam library under Steam\steamapps\common\Crusader Kings III\game. Mods are usually placed in your Documents\Paradox Interactive\Crusader Kings III\mod folder.
  • Text Editors: You'll need a plain text editor. Notepad++ is highly recommended due to its syntax highlighting and other features that make code easier to read and edit. Avoid using rich text editors like Microsoft Word.
  • Mod Structure: A basic mod consists of a .mod descriptor file and a folder containing your mod's files. The .mod file tells the game about your mod, including its name, version, and where to find its content.

Your First Mod: Changing Character Traits

A simple and rewarding first mod is to alter existing character traits or create new ones. Traits are defined in files within the game\common\traits directory. For example, the 00_basic_traits.txt file contains many fundamental traits.

To change a trait, you would typically copy the relevant section of the trait definition into your mod's own trait file (e.g., my_first_mod\common\traits\00_my_traits.txt). You can then modify its modifiers, such as adding or subtracting skill bonuses, opinion modifiers, or lifestyle experience gains. For instance, you could make the 'Intelligent' trait grant a larger learning bonus or add a new personality trait that gives a significant diplomatic boost.

Remember to always back up original game files before making any changes, or better yet, work entirely within your mod folder to avoid corrupting your base game installation. Launching your mod is as simple as enabling it through the Crusader Kings III launcher.