One game center account for two iOS apps

Question

Anyone knows what I need to do to have both my free and paid versions feed the same Game Center leader board?

Answer 1

I'm afraid that's not possible, because the Game Center uses the application's "bundle identifier" (such as com.myCompany.myCoolGame) to identify a game -- and two apps cannot have the same identifier.

That's at least the status in iOS 4.1.

Answer 2

Provide a complete app, but disable features. Then use an in-app purchase to unlock these functionality. This way, 'both' Apps will have the same identifier.