It helps to be free on the fastest-growing mobile platform, but that shouldn't draw all the attention away from Rovio's latest announcement. It's space-based reinvention of Angry Birds has now topped 50 million downloads in under 35 days, breaking its (and presumably everyone else's) record for mobile game downloads. In Rovios's own way, it recently thanked eager gamers for their consistent downloading support by slathering ten additional
