A/N: So, I finally got around to watching Doom and it inspired me to write this little ditty. This will probably be my one and only Doom fic, so I apologize if everything isn't spot on. It doesn't follow the movie exactly, I know. Reviews are always nice. Cheers!

Chapter 1- Left Behind

I leaned back in my chair with my hands behind my head, resigned to my fate. The sirens blared and the red warning lights flashed every two seconds. I sucked on my bottom lip as I looked over at the nano wall in the med bay that was closed for the moment. God knows what was running amok on the other side.

What a fucking bizarre way to die.

I never wanted to come to the Olduvai research station on Mars. Earth suited me just fine. I had envisioned a nice little private practice somewhere, pulling down a nice six figure salary and an early retirement in a warm locale. But no. Like a fucking moron I happened to be in the wrong place at the wrong time when a surgeon was needed on Mars. It was only a short term assignment, they said. You'll be home in no time, they said.

Fucking liars.

I was assigned to work under the charming Dr. Carmack. I knew from the moment I met him that he was a cowardly bastard that would throw anyone necessary under the bus to save his own hide. Sure enough, word spread quickly that he had ordered an evacuation and called in the Marines to save his ass, but neglected to tell everyone- namely me. I pushed a stray lock of hair out of my eyes and glanced at the door again when I heard a blood curdling cry and growling. I had no idea what the hell was out there, but I caught a glimpse of what looked like a skinned alien with big, nasty teeth and it looked like something I wanted to stay clear of. I made sure the gun I had smuggled into the facility was locked and loaded. One bullet was all I needed.

There was no way in hell I was going to let one of those damn things rip my throat out.

This wasn't the way I had envisioned my life ending. I was almost pissed. If I knew that I only had 30 odd years to be on this planet, I would have skipped college and just spent my time getting drunk and high at parties and fucking every guy that could get a hard-on. Looking back now, all those years of med school were a fucking waste of time and money. Sure, putting humpty back together again was a neat party trick, but it wouldn't do me a lot of good if one of those things got in and sucked out my brains. It was pretty hard to operate on yourself anyway.

I jumped and grabbed my gun as the nano wall dissolved and a familiar face appeared, panicked and just as surprised to see me. "Sam." I breathed in disbelief. "Why the fuck are you still here?"

She looked dazed, but relieved to see me. "Alex!" She smiled. "Carmack told me to stay and retrieve the data from the research, but he is missing. Have you seen him?"

I tossed the gun back on the crash cart next to my chair and plopped down. "Just like him to delegate the dirty work. I hope the zombies got him, it would serve the bastard right."

She seemed upset by my ill will, but she knew I hated him with every fiber in my being. "Why didn't you go?" She asked glancing back at the nano wall just to make sure it was opaque.

"I didn't know we were evacuating." I sighed kicking my feet up on a nearby table. "I was in the OR and the next thing I knew it was just me and the patient. Someone could have told me what the ruckus was for." I lamented.

"What happened to the patient?" She inquired pulling up a stool and sitting next to me.

"Didn't make it." I replied in a low voice. "I was taking him down the hall to the morgue and one of those goddamn things jumped out of nowhere and took a bite out of him right in front of me like it was eating sushi or something." I tried to shake the gruesome image out of my head.

"What do you think they are?" She puzzled. "I haven't seen one, but I saw bodies on the way here."

"Fuck if I know, but I can tell you it wasn't human." I laughed. "I can't imagine what the hell they are or where they came from, but they clearly have a taste for human flesh."

"Well, Carmack called in the Marines. Hopefully they will be here soon." She sighed rubbing her face.

I hadn't been at the facility for more than three months, but Sam Grimm was probably the closest thing I could call a friend. Of all the people that worked there, she was the only one who bothered to introduce herself and tried to get to know me. It helped that her room was down the hall from mine and I found her to be persistent and trustworthy. I also knew she was dedicated to her work at the dig and at first we would discuss the human remains she found, but as time progressed she began to tell me more personal details of her life and for once I didn't find it annoying. There was a pureness about her that I found intriguing.

"Yeah," I mused, "didn't you tell me you had a brother that was in the Marines?" I asked squinting at her.

She chuckled with a faraway look in her eye. "John, my twin."

"I forgot you were a twin." I nodded examining my fingernails. "So it is pretty clear then who got the brains in that batch of baby batter." I smirked at her and she laughed.

"Actually, he is wasting his talent and we fight about it all the time. He is way too smart to be a grunt. It seems we can only civilly converse by one liners in annual birthday cards." She said sadly.

"Hell, at least he sends you one. Being a man, I am surprised he even remembers. But then again I shouldn't give him too much credit since it is the same day as his." I muttered.

"He is actually a nice guy," her smiled faded somewhat, "at least last time I saw him. But that was years ago."

"I bet he is prince fucking charming if his job is carrying a big gun and killing people." I shook my head. "But I shouldn't be too pissy about the military because they keep me in business with a steady stream of fresh bodies to put back together like a jigsaw puzzle."

She laughed and flashed her beautiful smile. "How did you ever get so cynical?"

I glanced up at her and sucked on my bottom lip for a few seconds debating if I should tell her. I was not the kind of person that shared my personal details with anyone because in the end, why should they care that your life was shit from the minute you took your first breath? But, as it seemed I was going to die before dinner… "It comes with practice. Once you see so many bodies blown apart from stupidity and war you stop caring about how it all happened. You can't change the world and you can't change human nature. All I do is patch them up so they can go out and do it all over again. It is a pretty goddamn hopeless situation if you ask me."

She looked at the floor and nodded in agreement. We both snapped to attention when we heard a soft shuffling sound outside of the nano wall. I reached for my gun and suddenly felt bitter about only having one bullet. I didn't want to see Sam get ripped up by those monsters, but I sure as hell wasn't going to be a hero…