multiplayer

Multiplayer architecture choice depends on your game genre and requirements. Dedicated servers suit competitive shooters with server authority for anti-cheat; host-based works for smaller cooperative groups with lower latency sensitivity; client-authoritative architectures reduce server costs but require robust validation. Each trades off server load, latency, and security differently.

State synchronization sends game object positions and states across the network, reducing bandwidth for turn-based games but increasing latency impact. Input synchronization sends only player commands, letting clients predict outcomes locally, reducing perceived lag in real-time games. State sync suits MMOs and cooperative play; input sync suits competitive shooters.

Latency handling combines client-side prediction, server reconciliation, and interpolation. Clients predict future state from inputs while awaiting server confirmation; servers validate and correct divergence. Interpolation smooths remote player movement between updates. Together, these techniques mask network delay in competitive and cooperative games while maintaining authoritative state.

Multiplayer bandwidth scales with player count, update frequency, and state complexity. Competitive shooters need 10-20 updates per second per player; MMOs handle lower rates with spatial partitioning. Optimize by sending only changed state, compressing coordinates, and using delta encoding. Update rate balances responsiveness against server and bandwidth costs.

Server-authoritative design validates all critical game actions on the server rather than trusting client input. Detect impossible moves, unrealistic aim assist, or state divergence. Combine with input validation, replay analysis, and behavior detection. This approach prevents common cheats but requires higher server load and careful network design.

Multiplayer networking principles adapt across genres. Turn-based games tolerate higher latency and use simpler state sync; cooperative adventures need smooth interpolation and faster updates; competitive shooters demand low latency, client prediction, and server authority. Genre determines which synchronization and architecture patterns optimize for your specific gameplay requirements.