Ok so I'm about to transition from mobileme and iOS4 to iCloud and iOS5. Like many people, I have a email@example.com Apple ID I have been using for purchases since forever and I have a firstname.lastname@example.org Apple ID that was created when Mobileme came out. I have already figured out that I need to set up iCloud using the me.com ID and then associate the gmail ID to the iTunes Store purchases section in Settings. What I don't understand is which one I should use for Game Center. My Game Center is currently associated with the gmail account but I really don't want to tie anything to the gmail account unless it is definitely necessary. So basically I have two questions: 1. Is Game Center directly tied to your game purchases and thus forcing me to need to use the gmail based Apple ID anyway? 2. Can I switch the Game Center to my mobileme address (that no purchases are associated with) before moving to iCloud and keep all achievements and etc.?