Portal 2 confirmed by Game Informer cover, due in 2010

The past week's bizarre pair of updates to Portal seemed to point towards an impending announcement of a sequel, and, well, they did. Game Informer has revealed that its April 2010 cover story is none other than ... Portal 2 -- which Valve has given a release window of "this holiday season." The magazine's site teases the 12-page feature, calling the game "a full-fledged, standalone sequel" with "new gameplay mechanics, storyline, and some surprising new twists."

We'd venture a guess that one of those twists has to do with wherever the portal featured in the cover art leads to -- a misty, jungle setting where some sort of seemingly derelict facility stands, overrun with vines. The flip-side of the cover is (cleverly) a view back through this portal into a familiar Aperture Science setting. Finally, the single cover line mentions "the people who are still alive," a potential hint at a reason for venturing into the new setting in the first place.

The issue should be hitting subscribers' mailboxes soon. Check out the full covers after the break.

Source -- Game Informer
Source -- Valve