How would you design a real-time multiplayer game server using WebSockets?

A multiplayer game server uses WebSockets for real-time state sync, authoritative server logic, and room-based session management.

The server maintains authoritative game state, while clients send input events via WebSockets. The server processes updates at fixed tick rates (e.g., 30–60 FPS), validates actions, and broadcasts state snapshots. Scaling requires sharding game rooms across nodes and using Redis or message brokers for cross-node coordination.