I remember that part of Portal's lore was revealed in the comic of Rat-Man, one of the scientists who was in Portal's laboratory, and he suffered from schizophrenia, but he was more reasonable than his colleagues, and he told them that giving lethal weapons to a psychopathic AI was a very bad idea...
Anyway, his colleagues didn't listen to him and everything went to hell.
I have only seen few part of the comic. I first learned about the Rat-Man from this video:
You can read online it in https://www.thinkwithportals.com/comic/
Or download in PDF, in http://media.steampowered.com/apps/portal2/comic/Portal2_Lab_Rat.pdf
Thank you!
I read it and it was amazing! Honestly I wish there were more content like it.
I think that the Valve company could very well give RatMan its own game within the 'Portal' universe
I would love to see a short but innovative game. The could even aim to make it a VR game.