A Giant Gallery of Secret Portal 2 Concept Art

So Valve is currently running some sort of Alternative Reality Game that I have neither the time to play, nor comprehend, but I do know it’s yielding some pretty cool prizes.

One recent batch of goodies unearthed is a whole host of Portal 2 concept art, which has now been declassified as the game is almost out, and we know pretty much everything we see here.

It’s a lot of pieces ranging from character designs to box art, and it’s pretty cool to see the development process for a title like this.

Check it out below:

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