Troopers in white plated armour; black visors of the abyss forming an emotionless mass of an unfeeling, remorseless army of an autocratic empire that Doomguy knew little of. Walkers, thirty feet tall, with large heads and a clumsy chicken-like gait. Spherical fighters glided overhead, with hexagonal wings, and unleashed an ear piercing shriek as they passed by.

Behind this disciplined battle force, came a horde of demons, their flesh red and their limbs plentiful; some with gaping jaws that displayed hundreds of razor sharp fangs. They snorted, roared and screeched with blood lust, stomping their feet in anticipation. 

There was a moment of bizarre tranquillity as Doomguy approached the host; they studied him, as much as he did them. For who was this green armoured warrior? An army of one? Against so many? A suicidal bid to reach some high level of stupid heroism? 

And then he brought up his BFG and discharged it repeatedly.

Explosions tore through the neatly arrayed white plated soldiers, followed by pulsating green lights that signified the dissolution of many organic bodies. What was only moments ago a disciplined force of well trained soldiers, quickly deteriorated into a mass panic. Red lasers fired at Doomguy in their dozens, many falling wide, others glancing him. 

Doomguy sprang to life, strafing left, and then right, firing again and again at the largest masses of his enemy. The BFG tore through their ranks, killing dozens upon dozens with seemingly little effort; a walker took a green plasma bolt to the head, dicing it in half. Laser fire continued to fly around him, some of them smashing into his armour, but none of it was enough to stop him. 

He continued to run side-ways in a freakish display of agile talent, escaping the worst of their return fire. The ground was a scorched ruin in his wake, where missed shots blasted sand into glass. 

A trooper came out from his left, blind siding him with a point blank shot to the face; Doomguy's visor shattered, glass raking his flesh and eyes. In a rage, he reached out and put his knuckle duster through the trooper's own visor, killing them instantly. A brief flash emitted from his recently slain foe, and energy rushed into Doomguy as he absorbed the trooper's soul. 

It was a familiar feeling; Euphoria gripped his senses, his muscles bulged, his skin thickened. Lasers slammed into him, seemingly having little affect, and he turned to his foe with a gleeful smile. Berserker rage flowed through him.

Doomguy charged forwards, disregarding his BFG, and leapt into the thickest part of the troopers. He launched his fist into the nearest, sending the man sprawling head over heels several feet in the other direction; knocking half a score of his comrades over in the process. Then, Doomguy turned sharply, gripped another trooper's head, and tore it from their shoulders with little effort. 

"RIP AND TEAR!" Doomguy roared out, as his enemy started to back off. "RIP. AND. TEAR."

The next thirty seconds were of blood soaked madness, as Doomguy continued to rip his enemy to pieces with his bare hands. The troopers turned and ran, broken by an enemy they could not understand. A few walkers covered their retreat, firing heavy lasers at Doomguy, and knocking him back.

Weakened by the relentless enemy fire, he stumbled backwards with each blow, until he was forced to admit temporary defeat. 

Saving the best for last, Doomguy managed to pull forth his semi-automatic rocket launcher as he strafed aside another barrage of heavy lasers. He responded with a salvo of missiles, that slammed indiscriminately into the walkers and the troopers they were trying to cover. One by one, they collapsed to the savagery of his assault, unable to get a clear shot as he began to run circles around them. 

For a moment, it looked as if he'd just taken on a whole army - but then the enemy craft zoomed in, swarms of them, unleashing green lasers and bombs. Doomguy disappeared under the resulting explosions and smoke.