[PSN-US] Free Fat Princess by Playing Its Piece of Cake Game on iOS (from iTunes US Account)

You need BOTH US iTunes account and PSN account (for now). Not sure if it will extend to EU/AU counterparts.

Sony Computer Entertainment has just released the free-to-play iOS version of Fat Princess, its popular action real-time strategy game for the PlayStation 3.

The mobile game, called Fat Princess: Piece of Cake, is a match-three RPG that has you escorting the titular roly-poly royalty to safety amid an invasion by the blue army. It offers a free download voucher for the Fat Princess game for the PlayStation 3. To get the voucher, you have to complete level 15 of the iOS game with your Facebook account. To redeem the code for your PlayStation 3 system, you must have a valid Sony Entertainment Network account.

Source: Appadvice.com