Player retention is crucial for the success of arcade machines, and tracking the right Key Performance Indicators (KPIs) helps operators optimize their business. Here are the most common player retention KPIs for arcade machines:

1. Play Frequency: Measures how often players return to the machine. High frequency indicates strong engagement.

2. Session Duration: Tracks the average time spent per play session. Longer sessions suggest higher player interest.

3. Revenue per Player (RPP): Calculates the average earnings generated by each player, reflecting monetization effectiveness.

4. Player Churn Rate: Identifies the percentage of players who stop using the machine over time. Lower churn means better retention.

5. Repeat Play Rate: Shows how many players return for additional sessions, indicating loyalty and satisfaction.

By monitoring these KPIs, arcade operators can refine game design, pricing, and promotions to enhance player retention and profitability.