Chris Buffa (Modojo): While no official (or even unofficial) scientific studies have been conducted, there's a good chance RAWR! Interactive's iPhone game, Count to a Billion, increases muscle mass in one's biceps by 38.9 percent. This is arguably the most intense button masher ever conceived, a title that makes Nintendo's Mario Party games seem weak by comparison. Blisters? Get out of here with your silly blisters.
On that note, we caught up with RAWR!'s Pedro Alejando Wunderlich to find out how he dreamed up this insane number cruncher.