Add a "Recommend This Game" feature.
Have a link that when clicked it will allow you to send a PM (and/or email) to another member recommending that they play the respective game. The link can be in two places:
- In the "Links" column of the respective Category (along with the Highscores, Report game and Edit game / Edit scores links).
- The Game Options block on the game play page (where the Champion, Description, & Top Scores blocks are).
The recipient message could contain a link back to the recommended game, the image of the game, and whatever text the person that sent the message included.
Having a "Recommend This Game" feature will attract members to the Arcade that may not have participated before. Likewise, it will help keep participants of the Arcade engaged in the games.
In addition, if an email option is added, it will help draw new members to the website.