Indie game developers have gotten together to offer a discounted set of games through June 1. Great titles like World of Goo, Osmos HD, and Sentinel 3: Homeworld are all available at a great price at http://goo.gl/WNzGz. Which one is your favorite?
I've gotten Canabalt HD, Anomaly Warzone Earth HD, Osmos HD, EDGE Extended, Avadon: The Black Fortress, Cogs, Snuggle Truck, and World of Goo from +Humble Bundle for Android bundles. Those are all great games, all of them are worth a buy!
Oh, I'd love to take advantage of these discounts... but.. wait! "Certain credit cards are not accepted for some Google Play purchases. For example, American Express cards are not supported for foreign currency transactions." So I can't. I have an American Express card. In fact, I have two. I simply can't buy anything in Google Play. So you're forcing me to issue another credit card? How does that make sense to you?