Whats this game called?

So this game is really about another game develper woth i think depression, and the whole game is about this guy talking about what this other game developer did and how their relationship got dark.

Jacksepticeye and Markiplier played it to, and it starts out with the narrator talking about a CS:GO map the other game develper made.

I remember the game got deep and emotional later on and i really enjoyed it but I don’t remember the name to it.

Most of you probably don’t have any clue what im talking about but i hope someone could send me to the right title.

Thank you ahead of time.