The game data including the user/character profile is all on my servers hosted on linode. We have 3 servers- [primary mongo], [secondary mongo], [mongo arbiter, redis(for leaderboards), nginx forward proxying to 4 tornado processes]. I chose to use mongodb because it seemed to fit our needs very well for a database. Our user/char data is always queried together, and therefore we don't need to do many joins. The data is sent and parsed on the phone as a json, therefore it is extremely convenient to keep the data in a collection instead of constructing it every time.
Link to the game: https://play.google.com/store/apps/details?id=com.pixelmaji.monsterrivals
