Valve have released the climactic part two of their free Portal comic, Lab Rat, and while I'm not sure if there's anything in there that quite tops the art on page 5 it does offer a great conclusion and a juicy scrap of insight into precisely who Portal's protagonist is. If you're looking forward to Portal 2's release date (only one week from now! WHAT?!) you probably owe it to yourself to read this.
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Total coincidence, but we sell some clothes