Transferring game data from iPhone 4 to iPhone 5?

I want to transfer all the game data from my iPhone 4 to the iPhone 5 (when it comes out).Is it possible?
And I'm talking about in-game data, not just the actual games/syncing. It would be nice if someone could explain how to do it or a post a link to something that does.

Actually, you can use the iCloud to transfer all the game data from iPhone 4 to iPhone 5.

Or, if you have purchased the games, you also can redownload the games from iTunse.

If you do not want to use the above ways, you can try to transfer the game data to computer first.

Here is the detailed information about how to transfer the game data from iPhone to computer:

Here, you can get more details for transferring game data from iPhone 4 to iPhone 5

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