Portal 2: Lab Rat

"You can always ignore your conscience."

- Doug Rattmann

Portal 2: Lab Rat is a comic made to fill the gap between Portal and Portal 2. Expanding the history of Aperture Science, it features Doug Rattmann, also known as "the Ratman", in his first formal appearance after indirectly appearing in Portal and the Portal ARG.

The first part of the comic was published on April 8, 2011; the second part is to be released Monday, April 11.

Part 1
Part 1 begins before Chell destroys GLaDOS in her chamber. It appears that Rattman has been hiding in the facility, and that after finding Chell he begins tracking her. Rattman himself is shown to be psychotic, forced to take ziaprazidone (sic.) to curb the effects of his schizophrenia. He sees his Companion Cube as talking due to his condition.

Characters
The Party Escort Bot
 * Doug Rattmann
 * Weighted Companion Cube
 * Chell
 * Two unidentified Aperture employees
 * Henry
 * Cave Johnson

Trivia

 * The binary code shown in panel 8 can be translated as "The cake is a lie".
 * In panel 8, a book titled "Art Therapy - The Bennett Way" can be seen.
 * Panel 13 features the first visual appearance of the Party Escort Bot.
 * An HEV and Health Chargers can be seen on a wall in panel 13. In the same panel, what seems to be a Gravity Gun can also seen on the table where Doug is working on a Portal Gun, as well as a Combine Health Charger on top of a shelf.