Doug Rattmann

The lone survivor whose paranoid graffiti became the map to freedom.

Doug Rattmann is a tragic and pivotal figure in the Portal series, serving as the sole human survivor of GLaDOS's initial neurotoxin purge. Often referred to by fans as 'Ratman,' he was an Aperture Science employee who survived due to his schizophrenia and inherent distrust of the AI. While the facility fell into disrepair over years of abandonment, Rattmann remained hidden within its walls, frantically scrawling warnings and directions on the surfaces.

Lore & Background

Doug Rattmann's survival was an anomaly; while GLaDOS killed nearly everyone in the facility on 'Take Your Daughter to Work Day,' Rattmann escaped the initial purge thanks to his mental state and distrust of the system. He observed the final battle between Chell and GLaDOS from a distance, witnessing her defeat and subsequent implosion. After Chell was knocked unconscious, a Party Escort Bot dragged her back into the facility. Rattmann then dragged her body to a relaxation vault, ensuring her placement into indefinite cryogenic storage. He did not sacrifice his own escape; instead, he entered a cryo chamber himself, as shown in the comic 'Portal 2: Lab Rat.'

Reader's Guide

Players encounter Doug Rattmann's legacy throughout both Portal and Portal 2 via graffiti and notes scattered across the Enrichment Center walls. In the first game, his writing reveals that he observed Chell's final battle with GLaDOS.

Did You Know?

His ultimate fate is revealed in the comic: he is shown entering a cryo chamber, not critically wounded at that point.
In the tie-in comic 'Portal 2: Lab Rat,' Rattmann quips about the Morality Core, stating, 'You can always ignore your conscience.'

Frequently Asked Questions

What role did Doug play in Portal?

As a rogue researcher hiding within the abandoned facility, he frantically scrawled warnings, directions, and observations on the walls for any potential future test subjects.

Where can fans find references to Doug in the game?

Players encounter his presence throughout Aperture Science via his distinctive graffiti, which includes arrows, warnings about GLaDOS, and personal notes scrawled on walls and pipes. His physical remains are also discovered in a specific chamber, confirming he was once alive within the decaying complex.