ZOO's 10 Best Games Of 2011!
Possibly the best mini-game ever received its own fully-fledged release at the start of 2011. Flitting between locations using the portal gun was mind-bending, but throwing in co-op play and another two portals was dastardly brilliant.
Portal 2 must have been a nightmare to design (we definitely wouldn't recommend playing with a hangover) but working out your path through a room is very satisfying. Another massive plus is that the game is actually really funny, with ZOO favourite Stephen Merchant voicing Wheatly, the floating eye-bot thingy.