I have played Portal 2's single player campaign and the entire thing was amazing; now, I'm playing the coop campaign and it's going extremely well! I never imagined that multiplayer of any kind would work in Portal, but it does! Here are a few screenshots from the first level of the single player game that I took.
Source URL: https://skyrimpictures.blogspot.com/2011/04/portal-2-screenshots-from-in-game.html
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