Portal 2 IGN Video Preview

IGN gives sits down with the long awaited Valve puzzle game Portal 2. From what's been shown, it'll be worth the wait. 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.