Retention features are essential to keep players engaged and invested in a game. The most effective retention feature is to make the gameplay itself enjoyable. When players find the core gameplay mechanics entertaining, they are likelier to continue playing. However, it's essential to go beyond just fun gameplay. To ensure long-term retention, it's necessary to incorporate different retention metagames. These metagames remind players to come back and play the game. Combining fun gameplay with various retention metagames can create a compelling experience that keeps players returning for more. This combination not only increases player retention but also increases the probability of monetization.