At last! Portal 2 was originally meant to be arriving this year but the release date got pushed back at E3 where we were given with the slight consolation that it’s headed to the PS3 as well as to Macs and PCs via Steam. Now Valve have finally revealed the exact date we’ll be able to get our hands on the second installment of the mind-bending puzzler. Read on to find out when you’ll be playing Portal 2 and just what Stephen Merchant has to do with it…