I asked the question Is Mr. Robot in Elliot's head?. There's a comment and a close vote that it is off topic. Now, I firmly believe that this show is considered at least Sci-Fi, as do many other sites on the internet. Dictionary.com states the definition as:
"A form of fiction that draws imaginatively on scientific knowledge and speculation in its plot, setting, theme, etc."
This show fits that definition. It's also been labeled as Cyberpunk, which is a sub-genre of sci-fi. As I stated, just because there's no spaceships or aliens doesn't make this show any less sci-fi.