MultiPlayerSessionPlugin

MultiPlayerSessionPlugin: A C++ multiplayer Steam plugin designed to simplify your development workflow.

• Date: 2023/09/30
• Author: Abdul Moez
• Version: 0.1.0 (Initial Release)
• Study: Undergraduate at GCU Lahore, Pakistan

Supported Engine Version

• Unreal Engines: 5.0–5.0.3
• Works exclusively on the Steam platform

Documentation

Step 1: Create a new project. In the plugin section (under Edit > Plugins), search for Online Subsystem Steam and enable it. Then, close the Unreal Engine editor.

Step 2: Copy the MultiplayerSession folder from this repository to the Plugins folder in your project directory. If the plugin folder is not available, create it manually.

Step 3: Open the DefaultEngine.ini file inside the Config folder in the project's root directory. Paste the following at the end of the file. You can change SteamDevAppId to your personal dev ID. The current ID is a test ID provided by Steam.

[/Script/Engine.GameEngine]
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Steam

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
bInitServerOnClient=true

[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"

Then open DefaultGame.ini file and paste the following at the end of the file. Here you will specify max number of players.

[/Script/Engine.GameSession]
MaxPlayers=100

Step 4: Delete the following folders from the root directory: Binaries, Intermediate, and Saved. Right-click on your project file (ending with the extension .uproject) and select Generate Visual Studio project files.

Step 5: Open the project by clicking on the .uproject file. It will prompt you to build the files; click OK.

Step 6: Open the Open Level Blueprint. On EventBeginPlay, set an action by right-clicking and selecting Create Widget. For the class parameter of the created widget, select WBP_Menu. On Return Value, search for the Menu Setup function and select it. Here, you can set three parameters:

• Num Of Public Connections: self-explanatory.
• Type Of Match: ensure it is unique for different matches.
• Lobby Path: the path of the level where the game begins. Pass /Game/ up to the Content folder, and then the next path to the Lobby map (e.g., /Game/Maps/Lobby).

Step 7: Compile the game and run it on different systems. Ensure Steam is running in the background.

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Contributor

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Support and Contact Information

If you require any assistance or have questions, please feel free to reach out to me through the following channels:

• Email: abdulmoez123456789@gmail.com

I have also established a dedicated Discord group for more interactive communication:

• Discord Server: https://discord.gg/RMNcqzmt9f

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