Recently named the most anticipated game of 2011 at the Spike TV Video Game Awards, and releasing worldwide in April 2011, Portal 2 will see players introduced to a host of fresh puzzles, devious new test chambers in never-before-seen areas of Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion from the original Portal. The game's all-new co-operative mode will feature its own unique campaign and characters, and will force players to both act and think together.