Portal 2: Lab Rat



Portal 2: Lab Rat is a graphic novel released in April of 2011. It can be found online and in the "Extras" Section of Portal 2. It was a joint project between Valve and established comic book artists, such as and, the comic depicts the events between the end of Portal and the beginning of Portal 2.

Plot summary
The comic follows Doug Rattmann, a lab worker at Aperture Science murder  putting himself to sleep.

The comic was released in two parts.

Trivia

 * On page 7, a book titled "Art Therapy - The Bennet Way" can be seen during the explosion, explaining why Doug Rattman is creating murals throughout the Aperture facility. He uses art as an an attempt to help his schizophrenia. "Art Therapy" is the name of the co-op DLC later added to Portal 2.
 * On page 8, there is a message in binary at the bottom of Chell's Application form. When converted to it reads, "The cake is a lie."
 * On page 13 of the comic, the Gravity Gun and Combine Health Dispenser from Half-Life 2, and the Black Mesa Health Station and H.E.V. Suit Charger from Half-Life make a cameo appearance.
 * In one of Rattmann's lines on page 25, he says "Both alive and dead, until someone opens the box". This is a reference to, a popular scientific theory involving a cat sealed inside a box.
 * In one of Rattmann's lines on page 25, he says "Both alive and dead, until someone opens the box". This is a reference to, a popular scientific theory involving a cat sealed inside a box.