Arcade game machines often rely on advanced networking synchronization techniques to ensure seamless multiplayer experiences. Here are the most common methods used:

1. Lockstep Synchronization: This technique ensures all players' inputs are processed in the same order, maintaining consistency across machines. It’s ideal for turn-based or deterministic games.

2. Frame Synchronization: Games synchronize at fixed intervals (frames), reducing latency issues. This method is widely used in fighting games like Street Fighter.

3. Client-Server Model: A central server manages game state and broadcasts updates to all connected machines, ensuring fairness and reducing cheating.

4. Peer-to-Peer (P2P) Networking: Machines communicate directly, reducing server dependency. However, it can suffer from desynchronization if one machine lags.

5. Rollback Netcode: Predicts player inputs and corrects discrepancies retroactively, minimizing lag in fast-paced games like arcade racers.

These techniques balance performance and accuracy, crucial for competitive and cooperative arcade gaming.