The Final Hours of Portal 2 1.5

The Final Hours of Portal 2 takes you deep within the top-secret office of Valve, creators of Half-Life, for an unvarnished, behind-the-scenes look at the making of its latest game Portal 2. Journalist Geoff Keighley was granted unprecedented “fly on the wall” access over the past three years to create this staggering 15,000 word multimedia experience