Installing BepInEx

Derail Valley uses BepInEx for modding. BepInEx is a mod loader and modding framework for Unity games. It is required for all mods to work.

Installing BepInEx

1. Download the latest version of BepInEx v5.
   You can get it from their GitHub, or by clicking this.

2. Find your Derail Valley installation folder.
   If you aren't sure where it is, you can find it by right-clicking Derail Valley in your Steam library, clicking Manager, then clicking Browse Local Files.
   

3. Extract the contents of the BepInEx archive into the Derail Valley folder.
   This can be done by simply dragging the contents of the archive into the folder.
   
   If asked to overwrite files, say yes.
   

Installing Configuration Manager

By default, BepInEx doesn't have a way to configure mods in-game. Configuration Manager is a mod that adds a configuration menu to the game.

1. Download the latest version of Configuration Manager.
   You can get it from their GitHub, or by clicking this.

2. Extract the contents of the Configuration Manager archive into the Derail Valley folder.
   This is exactly the same process as installing BepInEx.
   

3. Start the game, then close it. This is required to generate the configuration file.

4. Open the BepInEx/config folder in the Derail Valley folder, then open the com.bepis.bepinex.configurationmanager.cfg file with a text editor like Notepad.

5. Look for the line starting with Show config manager. By default, this is set to F1. This conflicts with a Derail Valley keybind, so you'll need to change it to something else like F10.

6. Save the file, and you're good to go!