Almost as good as the first one. Main reasons are lack of cake, unfunny Wheatley and slightly boring one-solution middle-levels. Otherwise Portal 2 is as clever as it is well written. And now Half-Life 2: Ep 3, please. [May 2011]
The graphics may not be of the same caliber of other AAA titles, and the story may falter from time to time, but those are paltry excuses not to experience one of the best current generation games around.