The emails that notify a player that it is time for their turn should include the map type for the game possibly additional identifying information
Specifics/Details:
The map type should be listed in the email alongside the game number for email notifications.
Another Idea might be to allow players to add a nickname for the game that could replace or append to the game number (Or perhaps just the game creator)
How this will benefit the site and/or other comments:
This would allow players to more easily see which game turns are due
Game number alone is both impersonal and difficult to distinguish