Valve is up to something Part III And it's Portal 2!
Published on Friday, March 05 2010

It has been announced in the newest issue of GameInformer, that Portal 2 will be out this Christmas.

 
In fact, it's even on the cover of April's GameInformer.
 

It's still unclear if Portal 2 will only be on PC, or if it will be out for XBLA or PsN.