



This comic, made available online about two weeks before Portal 2's release, includes Wicklund's art To help develop the history of Aperture Science, and the span of time between Portal and Portal 2, Valve expanded upon the unseen character of the "Rat Man" in both Portal 2 and through a digital comic, "Portal 2: Lab Rat", whose storyline takes place between the two games. To help develop the history of Aperture Science, and the span of time between Portal and Portal 2, Valve expanded upon the unseen character of the "Rat Man" in both Portal 2 and through a digital comic, "Portal 2: Lab Rat", whose storyline takes place between the two games.
