source: www.qj.net
http://www.qj.net/images/stories/portal2_box_ps3.jpg
http://www.qj.net/images/stories/portal2_box_xbox.jpg
http://www.qj.net/images/stories/portal2_box_pc.jpg
The highly anticipated puzzle-shooter is scheduled to arrive on April 18, 2011 for the PS3, Xbox 360 and PC.