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Testing Multiplayer Alone

source: !localnetwork and !exeshortcut in the Risk of Rain 2 Modding Discord server.

Connecting two local instances of the game

  1. Add the following line to the Awake() function of your BaseUnityPlugin subclass: 
    // Remove this line before publishing/releasing your mod!
On.RoR2.Networking.NetworkManagerSystemSteam.OnClientConnect += (s, u, t) => {};
    • Alternatively, you can install the mod Nuxlar-MultiplayerModTesting instead (read the README for usage)
      • Note: only the host mod profile should have this mod enabled. Otherwise, clients will be spawned in as Commando(??)
  2. Launch two instances of the game
  3. Host a private lobby with one instance
  4. Open the console on the other instance and input connect localhost:7777

Create an executable shortcut for modded profiles

You can create a shortcut that points to the Risk of Rain 2 executable that, when clicked, will open an instance that corresponds to a desired r2modman profile. This is especially useful in scenarios where you need two instances of the game open, such as when testing networking locally.

Steps

  1. Create a shortcut of your Risk of Rain 2 executable
    • Windows: right-click Risk of Rain 2.exe, then "Create shortcut" in the context menu
  2. Open the properties of the new shortcut
    • Windows: right-click the shortcut, then select "Properties" in the context menu
  3. Copy your preferred r2modman profile's launch parameters
    1. Open r2modman
    2. Select profile
    3. "Settings" section > "Debugging" tab > "Set launch parameters" option
    4. Copy the inline code block labelled "Modded" 
      # Example
--doorstop-enabled true --doorstop-target-assembly "C:\Users\user\AppData\Roaming\r2modmanPlus-local\RiskOfRain2\profiles\Default\BepInEx\core\BepInEx.Preloader.dll
  4. Append the launch parameters to the "Target" field of the shortcut's properties 
    # Example

# before
"C:\Program Files (x86)\Steam\steamapps\common\Risk of Rain 2\Risk of Rain 2.exe"

# after
"C:\Program Files (x86)\Steam\steamapps\common\Risk of Rain 2\Risk of Rain 2.exe" --doorstop-enabled true --doorstop-target-assembly "C:\Users\user\AppData\Roaming\r2modmanPlus-local\RiskOfRain2\profiles\Default\BepInEx\core\BepInEx.Preloader.dll
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