If you play a game like Infinity Blade and have been playing for a long time and built up a great character on your iPad. There is a way to transfer this character to another device, like an iPad 2. You can also use these instructions to make a backup of your character files.
You basically need to use an application like the free app iPhone Browser, and copy the settings file to the new device.
1. Install game on the new device.
2. Install iPhone Browser on your Mac/PC.
3. Copy the settings file from the old device to your desktop (see link below).
4. Replace the settings file on the new device with the file you copied.
Transfer Article:
http://www.redsn0w.us/2011/03/how-to-transfer-game-saves-between-ios.html
iPhone Browser:
http://www.macroplant.com/iphoneexplorer/
Good luck and enjoy.