A sequel to the acclaimed first-person puzzle game centered around a portable portal device, the artificial intelligence Glados, and the Aperture research labs. This time, we'll once again have to escape turrets and paralytic gas in hopes of reaching the surface. The new Portal game features co-op play.
Portal 2 Walkthrough:
Chapter 1: A Social Call - Meeting New People.
Chapter 2: Cold Start - Aerial Faith Plates.
Chapter 3: Return - Bridges of Light and Turrets.
Chapter 4: Surprise - The Last Bag of Confetti!
Chapter 5: Escape - Swapping Turrets and Sabotaging Neurotoxin.
Chapter 6: The Fall - A Walkthrough of Abandoned Labs.
Chapter 7: Reunion - A Story of Years Gone By.
Chapter 8: The Itch (Part 2) - Making Our Way to Wheatley.
Chapter 9: The Part Where He Kills You - The Finale.
Co-op Mode - Co-op portal 2 play Guide.
Aperture Tag - A Mod with a Yellow and Blue Paint Gun.
Portal Stories: Mel - You Are Now an Olympic Champion.
Other parts:
1. Portal 1 - you wake up in a glass room with a radio.
2. Portal: Prelude - the events take place before the first part.
3. Tricks and Glitches - how you can speedrun portal series.