The Companion: an excerpt from Chell's Diary

I don't know the date anymore. I am loosing my sense of time, my sense of reality. It seems like it has been years since I have seen the light of day. All I have to live for is- that's just it. I don't know what to live for anymore.

GLADoS introduced me to a cube that I am most attracted to, for whatever reason. She calls it the companion cube. I don't know if I am going mad, but this cube relaxes me. It is the only thing I can trust anymore. The only friend I have.

A while later:

I am contemplating my suicide, but that would only please the computer though. I incinerated my best friend today, by force. GLADoS knows what is best, I guess, and ensures cake in the next room. I feel the heat radiating from the oven already, so she mustn't be lying. My eternal pain is over. There will be cake.