Rockstar paid $4.5 billion for these patents, and has launched a major attack.    



From ArsTechnica:

This afternoon, that stockpile was finally used for what pretty much everyone suspected it would be used for—launching an all-out patent attack on Google and Android. The smartphone patent wars have been underway for a few years now, and the eight lawsuits filed in federal court today by Rockstar Consortium mean that the conflict just hit DEFCON 1.

Google probably knew this was coming. When it lost out in the Nortel auction, the company's top lawyer, David Drummond, complained that the Microsoft-Apple patent alliance was part of a "hostile, organized campaign against Android." Google's failure to get patents in the Nortel auction was seen as one of the driving factors in its $12.5 billion purchase of Motorola in 2011.

  Patent war goes nuclear: Microsoft, Apple-owned Rockstar sues Google