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The Final Hours of Portal 2, also known as Portal 2 - The Final Hours, is a PC, Mac and iPad interactive book chronicling the development of Portal 2. Written by Geoff Keighley who also authored The Final Hours of Half-Life (2000) and The Final Hours of Half-Life 2 (2004), it was released on April 21, 2011 on iPad and May 17, 2011 on Steam, and is available for $1.99, €1.99 or £1.49.
The book provides exclusive information about the game's development, as well as numerous previously unreleased concept art images and early screenshots. It also contains interactive features set around standard text.
Foreword by Geoff Keighley
About the game
About the developer
Chapter 1: Let the Games Begin!
Describes a typical day at Valve.
Chapter 2: Prince Squid and Judge Dredd
Chapter 3: A Triumph, Huge Success
Chapter 4: Two Bots, One Wrench
Talks about the Two Bots, One Wrench design experiment as part of the "Directed Design Experiments".
Chapter 5: Eccentric Dead Billionaire
Describes the fifth Directed Design Experiment, F-STOP, or the failed attempt at a Portal prequel that did not feature any portals.
Chapter 6: The A-ha Moment
Documents Valve's issue of how to make a storyline-filled game from Portal and how Personality Cores were the answer.
Chapter 7: Just One Person
Chapter 8: The Power of Paint
Chapter 9: The Odd Couple
Chapter 10: Making Games is Hard
Summarizes the "surprise" Gabe Newell made at E3 2010 and Valve's need to delay the release date for 2011.
Chapter 11: Used to Want You Dead
Chapter 12: The Final Hours
Talks about the last few steps before completing Portal 2, including details from inside the "test chamber", or playtesting area.
Chapter 13: The World is About to Change
Closes the book by describing the thoughts and feelings of Valve after Portal 2 was finished and released.
Bonus: The Art of Rattmann
Contains the scribblings that the Rattmann made on the walls in Portal 2.
Contains the credit reel for the people who created the game.