Doug Rattmann

Doug Rattmann, also known as Ratman, is a former Aperture Science employee and brief love interest of Chell Johnson until their apparent deaths. He is a minor character in City 17 Street, and the main protagonist of Portal: Rattmann Adventures.

Engagement to Chell and death
In June 2014 Rattmann became engaged to Chell, however this soon ended when the pair of them were caught in a car explosion. Chell's ex-boyfriend Nathan Johnson was informed that they were killed outright in the crash. Although not emotional in the demise of Rattmann, he did grieve the loss of Chell.

Aftermath
In March 2016 it was transpired that Chell didn't die in the crash, and that a double was sacrificed as part of a plot by the mysterious Clandestine Company. It isn't known though if Rattmann himself had died or a body double was also placed for him. Chell herself was unsure when she escaped the Clandestine Company's experiments and reunited with Nathan, although she was convinced they allowed him to die.

Reboot Continuity
Doug Rattmann enters into cryo stasis. Thirty years later, he awakens from his slumber and finds himself in a whole new world which had been previously ruled by an evil alien empire. Moving to a country town, he finds himself involved with a British division of Aperture Laboratories, which is running strange experiments. Soon the experiments are released into the town, which is hybrids of humans and different assortments of creatures. The Mantis-Men act as soldiers that go to war with the army, with the military being led by Adrian Shephard. During this war Rattmann befriends Abby Hall, who he saved from Aperture following the activation of GLaDOS. She reveals that she has been converted to a part-cyborg organism and has called herself the "Mainframe", but she has her humanity still intact.

It is revealed that most of the town's residents have been kidnapped by Aperture Hills, and replaced with guinea pigs disguised with human flesh. The guinea pigs rule the town and spread a specialised neurotoxin which begins to mutate the remaining populace into zombie slaves. Doug is saved by Abby, who provides him with a cure that will prevent him being mutated. He goes into hiding, finding him in the same situation he was with back in Aperture Laboratories. His schizophrenia returns, and he hallucinates his beloved Companion Cube, which now sports that of a fluffy white dog's head, but is still retaining the English language.

Trivia

 * As Doug Rattmann has no actual model created for him, the Male_04 citizen model from Half-Life 2, complete with white Aperture coat and messy hair, was used instead as a placeholder. In his solo series, Rattmann uses the Male_07 model, complete with long white trenchcoat, and a shirt and tie, and partially messy hair.