Things that would suck if it happened IRL.

Dark spirit xXxMeTaL-GeAr-420xXx has invaded!

the whole fallout escenario would suck a lot...

Necromorphs and The Marker from the Dead Space franchise. I would include Unitology, but that in a way already exists in our reality.

Dying. Yeah. Dying sure would suck

There are many things that would bring absolute terror in reality. Here's a short list of of them that tie for 1st.

"S.T.A.R.S.!" - Nemesis, Resident Evil 3

"Welcome to Silent Hill." Whether a sign or a greeting, you know you're doomed.

Hearing a gigantic spider nearby. You know, the monsters that would make the ones in Australia look tiny and harmless. I don't care what game, comic, or movie they're from, they can all go burn on the surface of the sun.

"Unable to Login to your Steam Account. Please contact support!"

Assuming Direct Control probably. Oh Harby you did it again. D:

"Do you not trust the feelings of the flesh? Our biology yearns to join with yours. We welcome you to our mass. But you puzzle us. Why do you serve our mother? How can you choose cold metal over the splendor of the flesh? But you fear us. We hear your thoughts, and they rage for your brothers who you believe dead. But they are not. They sing in our symphony of life. We offer another chance to join us. If you choose to lie down with the machine, we will rend you apart, and put you separate from the joys of the mass."

Tonight. You.

Not a phrase but an scenario. Travel on plane for more than 8 hours among the passenger of Control Air, creepy as duck.

Scream- "What's your favorite scary movie?"
And the other one is any Zombie Game or Movie

DayZ... seriously. KOS.

Don't blink!

Being a NPC

"Hello, we are about to launch an attack on your houze. Sincerelly, the Zombies." (from Plants vs Zombies) O.o :D