Are there any (ideally competitive) games on the app store that can be played against players using a mac or just a browser? For instance, if I wanted to play a game against someone using my Mac whilst they only had an iPod Touch, is there a game that they can download and I can access online that can fill this role? Ideally looking for a turn-based game with log-in accounts. Please don't recommend they use the same web app, as I really don't think they'll remain interested if they have to use safari. FYI - this is so I can play games with an elder relation who lives abroad.