Meta XR Simulator Multiplayer

1. Start a Synthetic Environment Server and keep it running in the background (see Getting Started with Meta XR Simulator for detailed instructions).
2. Launch multiple simulator instances at the same time. We recommend the following workarounds:
   • Option 1: Clone your project so that each copy can be opened in a separate Unity Editor window. This can be achieved by copying the entire project directory or using symlinks to share common folders. Then, launch Meta XR Simulator in each window by entering the play mode.
   • Option 2: Build your application as a standalone binary on Windows, and set the system’s active XR Runtime to Meta XR Simulator:
     • In Windows Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenXR\1 and create a field named “ActiveRuntime” with type REG_SZ.
     • Find meta_openxr_simulator.json under your project folder, and set the registry value to /path/to/meta_openxr_simulator.json.
     • Then, you can run your game in the simulator from outside of Unity.
3. Coordinate the input for all players.

• Option 1: Provide input to each simulator manually, one by one.
• Option 2: Use the Record and Replay functionality (see Meta XR Simulator Session Capture for more details) for simultaneous action playback.