Okay so this isn't my first attempt at an Alien fanfic, but its probably my most creative version yet.
Please note I allowed myself a lot of creativity in this story, hope you enjoy.

Far below the surface of the mining colony BS-077, was a dark and humid room, with odd organic looking objects dangling from the ceiling that cast a dull ghostly light across the occupants of the room.

Commander Rook of the 1st battlement of the 3rd regiment, was a dark African American man with a face etched with horrible burn scars that covered part of his nose and cheek. His body was covered in the standard issue M3 Personal armour system, with his shoulder lamp still flickering occasionally from its perch, casting flickering light on the strange organic looking walls opposite to him.

Rook groaned softly, eyes lids scrunching up for a brief moment in pain before slowly opening. At the first sight of the organic looking walls, the man's head shot upright, eyes wide open and fully alert for danger. Looking around the room, he saw the familiar yet slightly different resin covered walls with their holes and corrugated surface dully reflecting in the small light offered.

He seen this all before, but last time he was the one walking into these rooms, not waking up upon the walls. Rook took a long look around the room, before focusing onto the wet and slimy resin like substance that was cocooning him to the wall.

The marine knew he needed to free himself, any second now a spider like alien would be leaping towards his face. Intending to implant a parasite inside him that would burst from his chest and into a killer xenomorph. Rook would not allow that to happen, struggling fiercely against his restraint. The man managed to wriggle his arm free and began pulling at the resin binging his other limb.

He pulled and pulled at his bindings, until a shadow passed over him and his lamp flashed light upon something the Rook had hoped was only a part of his nightmare. Sharp lipless jaws snarled in the Rooks face as a 4 clawed hand grabbed him by the wrist and pinned it painfully against the wall, the alien growled threateningly, hovering with its bony armoured head just inches from the marine's scared face.

Rook had hoped it was a dream, that the monster's he was facing were the same insect like creatures he faced before. But no, before him stood something similar to those aliens, yet larger with thick bony like armour across its eyeless skull and chest that made them very hard to kill.

The skull was sharp and 'V' like in shape, with spikes flanking either side of the face, below the bony armour was a set of lipless jaws full of long crystal like fangs that reminded Rook of the Matriarch Xenomorph he managed to kill on BG-386.

It body looked nearly identical to that of a Xenomorph, yet with thicker limbs that took on a more muscle fibre like appearance than hard black exoskeleton. With a long segmented tail tipped with curved blade, along its back were 6 tubular spikes that were short in nature, Rook had no clue what they were for but he didn't care, all he knew was these aliens were tough to kill.

The alien slowly drew back, its bulk moving aside yet still pinning the man to the wall. Rook continued to glare at the alien, until he saw something on the floor like an egg, open into 3 pedals and revealing some king of serpent looking creature covered in slime.

Rook tried to free his other arm still trapped by resin, he struggled and thrashed until sudden claws grasped his head. Holding him in place. But the man continued to try and break free, he wouldn't die like this.

The serpent like creature slithered up the alien's body, slowly making its way along the monsters arm and towards the man's face.
Rook gritted his teeth, he couldn't let this thing inside him, the serpent drew closer, until it raised its head like a cobra and several long tentacle extended from its slimy body around the head.

A cloud of powder suddenly smack into Rooks race, making his nose itch and his eyes sting. Without warning, the mans' jaw slacken, and Rook shook violently as he felt something wet push its way into his mouth.

Rook continued to struggle as the serpent painfully slipped down his throat, threatening to choke him to death as it obstructed his air ways. Then as quickly as it started, the serpent was gone, and Rook was left gagging and coughing with a numb jaw.

Stepping back, the alien looked at the Rookie for a moment, before using its claws to rip away the resin holding him place and allowed the human to collapse to the floor. It looked at him for a moment, before notice another human beginning to awaken and strolled off to repeat the process it just put the Rook through.

Rook felt like his insides were on fire, he could feel the serpent thing moving around inside him along with other things that felt like ice running through his veins. He gasped for breath and found his armour felt too tight, he began wrestling with the buckles and Velcro strapping wildly to relieve the crushing pressure around his chest.

But as the mesh of protective material hit the floor, the pressure didn't subside, and the man began removing his other pieces of armour with fumbling hands.

Once all the armour was gone, Rook felt stabbing pain at the base of his spine, clothing tore and the horrid sound of grinding bone followed. The Rook let out a roar of pain as what looked like a tail ripped its way from his rear, bone and muscle still twisting and fusing until it solidified into a segmented tail tipped with a blade.

Heat washed over the marines back, as more bones snapped and reshaped themselves, with the man's neck pushing outwards painfully making him cry out in agony.

His clothing tore apart, along with his flesh that split apart to reveal bulging bundles of muscle.
Rooks pinkie disappeared into his hand, with his outer finger curving into a more thumb like position while his fingertips grew long and pointed like claws.

Then, the Rooks skull literary burst through his flesh, his nose pushing outwards into a more shark like snout comprise of solid bone, this same bone covered his eyes and ears, curving backwards into two spikes like a crest.

Rook made an inhuman like noise as his teeth were replaced with fangs, and another smaller inner set of jaws formed behind the first.
He coughed and gagged, rolling onto his hands and knees as his legs shifted and broke, morphing into a posture that would force him to walk on the balls of his feet.

To finish off the processes, Rooks muscles darkened to a reddish hue, which could be mistaken for black in the darkness of the tunnels. His chest heaved and shuddered one last time, as the final large plate of bone slowly finished growing upon his chest that connected to his now exposed rip cage.

Panting for breath, the Rook kneeled there for some time, mind still clouded from the pain he just experienced. He didn't want to believe what just happened to him, it just wasn't possible, not logical. Why did it have to happen to him, and why was he craving a juicy cooked steak?

Making a snort noise, Rook raised his head and turned it left and right around the room. Everything was different now, the room looked blurred and without colour, objects would briefly show more detail than others, before becoming blurred once more like he was wearing someone's glasses.

"Greeting Brother, welcome to the nest" the voice seemed to echo in Rooks mind, making his loose his balance and threaten to keel over onto his side.

"Steady brother, it will take time to… adjust to your superior form" shaking his head, Rook turned his gaze to the side and spotted the alien from before looming above him.

Rook didn't say a word, he just allowed an aggressive growling noise to leave his new and odd feeling jaws at the alien towering over him.
But he soon stopped growling as began to notice whispering all around him, most muffled but he caught glimpse of conversations, emotions, smells, everything.

"Breath Brother, don't fight the nest, just let yourself go" urged the alien beside him, Rook growled and fell onto his side, causing the other alien to move closer and nudge his shoulder with a pointed nose.

"Your one with us, the Mother will be overjoyed to see you" announced the alien in a cheerful way, making Rook wish he still had a face to silently express his displeasure.

Getting up, Rook was surprised he found it relatively easy to control his new body, everything felt basically the same. All accept his sense of balance and the new tail dangling from his body behind him, it was irritating for the former marine and he just wanted to shoot the bloody thing off.

The he heard it, a soft singing voice that just captivated his mind. Looking in the direction of the voice, he unconsciously began to lumber along. Switching between walking on both legs, to walking on all fours several times. Rook found himself slowly entering a large chamber filled with several small fleshy and fragile looking eggs. Hanging from a wall on the far side of the room, above an open exhaust vent for the thermal reactors deep below the colony. Hung a massive alien that reminded the Rook of a Xenomorph queen.

Its body head held a massive crest of long spikes that flanked behind its body, large and thick limbs adored its chest with a smaller inner set of arms tucked against its chest. Organic structures held the large alien in the air, while also supporting a long fleshy looking structure that was producing the small eggs that littered the room.

Rook was surprised by the similarities between these aliens and the Xenomorphs he encountered, but he didn't have time to ponder this as a few more aliens walked into the room past him. Following them, Rook realised it was the larger, queen like alien that was singing with a beautiful voice.

He just felt so calm to hear her voice, like a mothers soothing lullaby to usher a restless child to sleep. Rook stood there amongst the others, all staring up at the alien who Rook assumed to be this 'Mother' someone mentioned earlier.

The Mother sudden stopped singing, and looked down at Rook and the others. Rook felt a sense of warmth and compassion suddenly emit from the alien, and he shuddered slightly at the unexpected sensation.

"Welcome my children to the hive, your new home" spoke the Mother in a soft and gentle voice, head moving left and right to examine each and every one of the aliens at her feet.

"I know your all feeling confused, shedding your weaker forms is a horrible experience but I assure you" Rook felt the Mother's attention settle upon himself "don't be afraid, you are safe under my care"

Rook shivered involuntarily at the words, and looked at the other aliens. He instantly noticed that a few lacked any horns or form of crest at all, and looked relatively thinner than himself and the other aliens. It reminded him of the difference between drones and warrior Xenomorphs with their slightly different appearance.

"Today you shall rest amongst your brethren, but soon, all will begin working to protect and expand the hive" the Mother took on a slightly more stern tone as she spoke the last part, but quickly covered it up with another wave of affection.

"Head to the feeding rooms my children, drink and rest" she hissed softly, and Rook found himself suddenly knowing exactly where he needed to go, his stomached growled hungrily for food and he looked at the others as they also began to walk off away from the Mother.

Rook and the others walked for some time, until entering a large room that was hot and stuffy, with a large body of boiling blue water in the centre of the room as well as several odd looking pods and organic looking structures that moved slightly.

Edging into the room, Rook brought his mouth towards the water and inhaled sharply unwittingly smelling the water below. It smell sweat, and Rook submerged his jaws into the liquid and began slurping up the hot substance down his throat.

After taking his fill, he raised his head and stepped back, attention now fix upon the organ like structures and pods in the room.
Moving away from the others to investigate, Rook looked inside one of the pods and felt his insides twist in disgust.

The pod contained a decomposing corpse, upon closer examination the Rook notice the pods were all connected to the organ like structure, which had root like tentacles entering the body of liquid he just drank from.

Rook growled softly at the deception, these aliens apparently had their own version of the nutrient paste he use to eat when on-board space craft, except this time it wasn't paste but liquid, made from breaking down corpses into some kind of food drink for the aliens.

As if sensing his thoughts, all the other aliens he had accompanied suddenly shot their heads away from the water, some spitting it out as they emitted feelings of disgust. Rook remembered a theory about the Xenomorphs having a hive mind, and wondered if it applied to these aliens thus why he heard thoughts and felt emotions from the other aliens.

"That is gross did we just drink that stuff?" yelled one of the hornless aliens in alarm, another alien with horns snapped its jaws in reply before also speaking out loud.

"We did, and we liked it… But what does it matter, it's not like were human much anymore" he said sounding bitter, oddly the voice sounded familiar, Rook was sure he remembered hearing someone over the radio reporting something with a voice like that before the attack.

"It matters, they took our bodies but not our minds, they can't change that?" replied someone else, but she couldn't hide her own doubts slithering through the hive mind for everyone to see.

"I think they already have… aye commander" Rook looked up as he felt someone emit a sense of familiarity, and he looked up at an alien with horns that seemed to remind the former marine of someone he knew.

"We should rest" hissed Rook softly, only just loud enough so the others could hear, he didn't like speaking, but he'd grown accustomed to speaking more since becoming a commander of other marines.

As if realising his former importance, everyone accepted his words and they moved off towards another room where they all sat down and settled down to sleep with full bellies.

But before falling into unconsciousness, Rook couldn't help but think about his friend Tequila, still out their fighting. Or so he hoped.

To be Continued.

AU: As I stated above I gave myself a lot of leverage in this story in what I did, but it was more fun testing the boundaries than sticking to the normal Aliens we see on this sight, also just for records there is no adult content planned for this... as of yet...

Moving on from that, I started writing this cause I was playing ALien VS Predator and finished the Marine and Alien champagne, but it got my thinking of stuff. I remembered someone else tried something similar but it got only 2 chapters through before stopping, I just took part of the idea further.

Anyway next chapters will be a mix between Human and... Not sure what to call these things, ideas are welcome but I leaning towards ProtoXeno? Eh I such at names, hope you all enjoy and yes, real Xenomorphs will be featured soon.

Oh and Look on DA at RedLightningNOD608 for the art I tried for the series, Its not much but I tried ^.=.^;