Chris Buffa (Modojo): Piracy is a huge problem in the Android world. It's so prevalent that many developers release their games for free. Madfinger Games went the opposite route with its zombie first-person shooter, Dead Trigger. The studio could've easily charged $5.99 for the game, but instead opted for $0.99, most likely thinking consumers would agree with that price. That said, even we were surprised to see such a gorgeous looking title come in at less than a buck.