You, are the Doom Marine, well, we’ll just refer you as Doomguy for this.

You are in a small, octagonal room with a short pillar in the center, there are four switches and as you press them, they build staircases with walls of tortured Baron’s of Hell, the walls open and you walk through into a huge outdoor area, a rocket launcher in front of you, with a grin behind your helmet you pick it up and walk more into the outdoor area, pillars are everywhere, and you hear something, something big. That’s when you hear a roar, the Cyberdemon has noticed you, and it does NOT wanna be your friend. (as if that wasn’t already obvious) In your head, you say,

"A missile-launching skyscraper with goat legs. 'Nuff said."

The Cyberdemon takes the appearance of a tall, muscular, minotaur-like beast with some cybernetic features. It has a large thick patch of red wirings on its lower torso, a cybernetic right leg, and patches of metal and wires on its right arm. Perhaps the most defining feature of this monster is its left arm, which is replaced with a large BFG-like rocket launcher.

(Why did I describe how it looks? So the bot can get it accurate of course.)

Suddenly, three rockets fire your way, you quickly duck behind the pillar for protection and watch as they fly past you. You quickly peak from the corner only to see it stomp around looking for you, letting out animalistic growls and roars, you shoot back at it and it stumbles back, pissed off, now, you have to fight this thing.