Portal 2 Official Thread of You Really Like This Hole :O

Single player mode: Approximately 7 – 9 Hours (2-3x longer than Portal 1)

Co-op Mode: Approximately 6 Hours (2x longer than Portal 1)

System comparisons:
Lens of Truth Portal 2 screenshot comparison
Play 360/PS3 screenshot comparison

Gottdamn the reviews are sick for this game so far.

Eurogamer (10/10) – “Portal is perfect. Portal 2 is not. It’s something better than that. It’s human: hot-blooded, silly, poignant, irreverent, base, ingenious and loving. It’s never less than a pure video game, but it’s often more, and it will no doubt stand as one of the best entertainments in any medium at the end of this year. It’s a masterpiece.” -Oli Welsh

G4TV – “However, I can say that while Portal 2 may not be for absolutely everyone, it undeniably deserves a place among the greatest games of all time. Mass Effect, Half-Life, Oblivion, KOTOR, Starcraft, Okami, Diablo, Ico, Bioshock, Doom, Grand Theft Auto, The Legend of Zelda: the list is long, and it has a new member. I am honored to have reviewed Portal 2, and look forward to playing it again tomorrow.” -Morgan Webb

Game Informer (9.50/10) – “The game’s quality stays consistently outstanding throughout; there isn’t a minute of filler content to be found anywhere in single-player or co-op.” -Adam Biessener

GameStar (91/100) – (translated) “The small cult game grows up: A mature campaign, an amusing co-op and magnificent physics puzzles adorn portal comeback.” -Heinrich Lenhardt

Giant Bomb (5/5) – “Despite being so much bigger than the original, I actually felt a little melancholy once Portal 2 was over, simply because it’s so rare to find a game this smart, this funny, and this rich with detail. It elevates Portal from an odd, memorable experiment to one of the most significant series in Valve’s stable with a unique voice and an incredible level of quality that all developers should aspire to.” -Ryan Davis

Guardian (5/5) – “Valve has created a masterpiece in Portal 2. The depth of content, the mind-bending mechanics and fantastic experience are almost certain to satisfy ardent fans of the first game; and to all newcomers to the series, it’s as simple as this: prepare to have your mind blown. Over and over again.” -Nick Cowen

IGN (9.5/10) – “Makes the original look like the prototype it was. It’s filled with a larger cast of characters vividly brought to life through brilliant writing and some of the best voice acting in video games…From the beginning of the single-player story to the end of the co-op mode, Portal 2 is a novel, unforgettable experience.” -Charles Onyett

Jeuxvideo (19/20) – (translated) “In its mechanics as well as in its writing, Portal 2 is simply brilliant, clever and terribly funny. This observation applies equally to its solo mode and to its co-op mode that will convert even those allergic to multiplayer.” -Nicolas Charciarek

PC Gamer (94%) – “A challenging, hilarious, and mind-expanding puzzle experience for one or two-treasure your first time through.” -Dan Stapleton

Videogamer (10/10) – “I think you knew all along this was going to be great. Fantastic, even. All the same, I don’t think you’ll be prepared for it being this good. I may have buttoned my lip in terms of concrete spoilers, but a mere ten minutes here will yield more memorable moments than you’re likely to squeeze out of the entirety of most other games this year. In all aspects of its design, Portal 2 is genius.” -Jamin Smith