And other platforms too!
Xbox Live Games Coming To iOS: Has Microsoft Really Lost Faith In Windows Phone? | WMPoweruser
Xbox Live Games Coming To iOS: Has Microsoft Really Lost Faith In Windows Phone? | WMPoweruser
I think allowing achievements on another OS would just be stupid. What next, Halo 4 for the PS3.
Correct me if I'm wrong, but Bungee jumped from Microsoft to Activision, so Halo 4 will probably be on the PS4.