Free Bonus Chapter Added The Final Hours of Portal 2 has been updated with a chapter on the making of the "Peer Review" DLC and the first details on the future of Portal 2! About the Digital Book The Final Hours of Portal 2 takes you deep within the top-secret offices of Valve for an unvarnished look at the creative process behind the new video game Portal 2. Journalist Geoff Keighley was granted unprecedented “fly on the wall” access to Valve to create this staggering 15,000 word multimedia exp...
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