Straight from Dark Horse Comics’ video-game panel at Emerald City Comicon, Dark Horse announced the brand-new art book for Valve’s Portal 2!

The Guardian said it was “an astonishing experience.” GameSpy called it “a near-perfect example of what can happen when all of the elements of modern game design are combined to create a beautifully cohesive whole.”

Now, Valve and Dark Horse pull back the curtain to give you a backstage tour of one of the most innovative video games of the decade! The Art of Portal 2 walks you through the visual evolution of the award-winning game, from concept to completion, with never-before-seen concept art and insights from the writers and artists behind the Portal series.

The sequel to 2007’s Game of the Year, Portal 2 is a hilariously mind-bending adventure that challenges you to use wits over weaponry in a fun house of diabolical science. More than four million copies of the Portal 2 game have sold worldwide.

The Art of Portal 2 offers incredible visuals of the Aperture Science facility and the creation of Chell and the rest of the cast, and features 184 pages of mostly never-before-seen art and a look into the design process of the legendary game studio.

“Portal 2 is a novel, unforgettable experience.”—IGN.com 

The Art of Portal 2 is on sale October 31, 2012!

For additional information, check out Kotaku!