After numerous delays, Valve has decided to kick things in to high gear by announcing a firm release date for the sequel to 2007’s critically acclaimed puzzler.  Portal 2 will release on February 9, 2011 for Xbox 360, PlayStation 3, PC, and Mac.  Valve has also confirmed that British writer and actor Stephen Merchant (The Office, Ricky Gervais Show) will voice the British robot Wheatley who has been featured in the game’s trailers.  “Meet Wheatley” at the Portal 2 site.

[Via GameInformer]