April 19, 2011 08:25 am GMT
Original Link: http://feeds.mashable.com/~r/Mashable/~3/KLhY9AIMdUY/
Was One Video Game's Alternate Reality Marketing Campaign Worth It?
Portal 2, the brain-bending sequel to Valve Software’s 2007 hit is arguably one of the most anticipated video games of the year. For the u…Original Link: http://feeds.mashable.com/~r/Mashable/~3/KLhY9AIMdUY/
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