Rules! free via Apple Store app
Download the Apple Store app (Apple Store) which is different to the stock AppStore app and go into the "Featured" section (found in the bottom left corner) and scroll to the bottom to find the offer. It's a great memory game so grab it while you can.
Last edited by VeganTnT; 04-13-2015 at 10:56 PM. Reason: Clearing up confusion on Apple Store and AppStore