Halo: Spartan Assault has gone universal: you can buy it once on one Windows-powered device and download it on your others. As we noted yesterday, Microsoft started accepting submissions for universal apps, and combined with the new unified pricing tiers and [universal app development] and automated certification we're starting to see the first universal apps appear. A notable entrant: Halo: Spartan Assault.
Full story from the WPCentral blog...