This report documents the research and development process used to create a multiplayer system and framework. In collaboration with VR Amsterdam, the researcher, along with two other graduation interns, created a multiplayer game played in mixed reality using Unity. The project uses Oculus Meta Quest Pro headsets due to the improved passthrough feature. The final deliverable refers to a proof of concept or a demo of the game, having most of the features implemented and working, though perhaps not completely polished. The author researched different networking solutions and documented the development of the framework and the gameplay.