User Installation

Prerequisites

1. Own the Steam version of the game (Meta Store and pirated versions do not work)
2. Unity Mod Manager (UMM) installed and working

If you already have UMM installed and working, see Installing Multiplayer Mod

Install Unity Mod Manager

Multiplayer Mod is built on the Unity Mod Manager (UMM) framework and requires UMM to be installed for the mod to function. UMM is a mod loader that supports many games.

Step 1: Download Unity Mod Manager

1. Visit the Unity Mod Manager page on NexusMods.
2. Click on Files and download the latest version of Unity Mod Manager
3. Extract the downloaded ZIP file to a folder of your choice
   This folder should be easy to access and will contain the UMM installer, which allows you to:
   1. Install UMM into Derail Valley
   2. Add/remove Derail Valley mods

Step 2: Install UMM into Derail Valley

1. Run UnityModManager.exe (it will be located in the folder you extracted).

2. Select 'Derail Valley' from the 'Game' dropdown list

   

3. The game's folder is usually detected automatically, however if it has not been detected, set the 'Folder' path to your Derail Valley installation directory (where the game’s executable is located)

   

4. Click 'Install'
   This will install Unity Mod Manager into Derail Valley

   

Step 3: Verify UMM Installation

1. Run Derail Valley If installation was successful you will see the Unity Mod Manager in-game window open once the game loads If UMM in-game window does not open, please check you have followed the above instructions or ask for help on the Derail Valley Discord Server
2. On the in-game window, click 'Settings'
3. Set 'Check updates' to 'Every Time'
   Optionally, you can change the default hot key ctrl + F10
   Optionally, you can choose to not show the UMM in-game window when the game starts
4. Press 'Save'
5. Press 'Close'
6. Quit Derail Valley

Installing Multiplayer Mod

Ensure you have installed and tested Unity Mod Manager before following these steps.

Step 1: Download the Multiplayer Mod

1. Go to the either the Nexus Mods page or the Releases page on GitHub
2. Download the latest version of the Multiplayer Mod (ZIP file)

Step 2: Install the Multiplayer Mod

1. Open the UMM Installer by running UnityModManager.exe from the Unity Mod Manager folder
2. Ensure 'Derail Valley' is selected in the 'Game' dropdown ('Install' tab)\
   
3. Click the 'Mods' tab
4. Either:
   1. Drag and drop the multiplayer zip file into the section labelled 'Drop zip files here'
      OR
   2. Click the 'Install Mod' button and select the multiplayer zip file

Step 3: Verify Installation

1. After installation, you should see the Multiplayer Mod listed in the Mods tab in Unity Mod Manager
2. Run Derail Valley
   Once the main menu has loaded you should see an additional menu option 'Join Server'

If the UMM in-game window is showing an error for Multiplayer, please ensure you are running the latest version of the game and installing the latest version of the mod. If you continue to have issues, please ask for help on the Derail Valley Discord Server

Multiplayer mod is now ready to be used.

For further information check out:

• Hosting
• Mod Compatibility

Updating the Multiplayer Mod

If you have 'Check updates' enabled in UMM and Multiplayer Mod is enabled, Multiplayer Mod will alert you when a new version is available.

 

If Multiplayer Mod is not enabled and 'Check updates' is enabled, UMM will still check for updates, but you will need to look at the UMM in-game window to know if an update has been released.

Installing the Update

1. Ensure Derail Valley is not running
2. Open the UMM Installer by running UnityModManager.exe from the Unity Mod Manager folder
3. Ensure 'Derail Valley' is selected in the 'Game' dropdown ('Install' tab)
   
4. Click the 'Mods' tab
5. Find 'Multiplayer' in the list
   
6. Right-click on 'Multiplayer' in the list
   
7. Select 'Update to (xx.xx.xx.xx)' from the context menu
   
   Unity Mod Manager will download and install the latest version of the mod.