Portal 2 Bot Trust Trailer

A new installment of the 'investment opportunity' video series (0:46)
Valve has released a new trailer for Portal 2, the sequel set to be available in the week of April 18, for PC, Mac, Xbox 360 and PS3. Portal 2 will see players introduced to a host of 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 campaign and characters, and will force players to both act and think together.