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Uploaded on Jul 19, 2010
This is the video announcing Portal being available through Steam on Mac and free from May 12 to May 24, 2010, released by Valve on YouTube on May 13, 2010, under the title "Portal is Free" (http://www.youtube.com/watch?v=BDj1fY...).
When the deal was over, Valve renamed the video "Portal is Free (Well, it was - now it's just a good deal)".