Author's Note: Epsilation here!

This story is a continuation of my previous story Mass Effect: Lost Past{.net/s/7397200/1/Mass_Effect_The_Lost_Past} (If you want to read it/catch up) I will do my best to make this as welcoming to new readers as well as people continuing the story. I plan for this to be my last FanFiction before I begin writing actual novels, so any and all criticism is welcome.
So I have played through ME3 multiple times and looked forward to transplanting my OC into the storyline. I am not a fan of the ending, mostly because there's so many questions left open, and I plan on rewriting it unless Bioware releases DLC that fixes it.
Bla, bla, bla legal stuff. I don't own Mass Effect titles yadda yadda.
So any way onto the story. Rated M for violence, language, and some sexual stuff.

Without any furthermore delay, I give you the next step in Shepard's journey, I give you...


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Mass Effect: Desolation

Prologue

The hallway was dark. The only light came from a window that looked out on a forming galaxy. The dim light emitted bounced off the perfectly polished floors and walls giving the insides of the space station a cold glow. The outsides of the station made it appear abandoned, but inside it swarmed with workers darting back and forth. Most of the workers were scientists busying themselves with their recent tests.
One of the manicured hallways stood devoid of life and activity. Various doors branched off of the hallway to rooms and personal quarters. All doors were locked, keyed to only open to a specific code that only the resident held, all but one. This single door, not distinguishably different that any of the others, stood unlocked its green light shining brightly.

A guard entered the hall, his boots quietly scratching against the polished floor as he quickly walked to the unlocked door. He was clad in simple white and orange armor, emblazoned with the symbol of his employer. As the door hissed open the guard immediately snapped to attention. Inside was a simple office. A metal desk fitted with holographic technology, floors flawless and polished, and a window overlooking the darkness of space. A man sat inside, his back to the door. His grey hair almost perfectly matched the grey metal of the desk. The glow of his piercing blue eyes reflected off the glass. As the man noticed the door open his eyes momentarily twitched to the side, trying to catch who entered in his peripherals, then immediately snapped back to the darkness in front of him.

"Sir, the prisoner is ready." He said straightening his stance.

The man didn't respond immediately, he just sat in his chair puffing away at his cigarette and reading some information that flashed across the holographic screen of his omni-pad. Taking one final drag, he set down his omni-pad and spun around in his chair. The man set down the omni-pad and extinguished his cigarette.

"Bring him to medical." He replied coolly, his face devoid of emotion, "alert them that I will be arriving to observe the operation as well."

"Yes sir." The guard said snapping a quick salute. He then turned on his heels and quickly exited the room.

"Orders from the Illusive Man, bring the prisoner to medical." the guard said.

"Wouldn't want to anger him, even now." The other guard said, lightly chuckling.

The guards walked toward the only active cell. Behind the field lay a man, his hands cuffed behind his back. He only wore a pair of black pants, faded and scuffed from times worn before. His chest was bare, exposing several scars from bullets, one stood out from the rest. This scar stretched from the bottom of his right shoulder to his hipbone. His head was lolled off to the side, revealing multiple cuts and bruises acquired during his hauling to the cell. The guards approached and deactivated the field.

"Don't get any wise ideas." One of the guards commented. The prisoner didn't respond.

"Come on, no sense to keep the boss waiting." The other guard said, beginning to lift the prisoner up by the arms.

"Yeah, yeah." The other guard impatiently responded. Reaching his hand through the prisoner's arm and lifting. The guard yelped and immediately dropped the prisoner, hard against the ground. "That bugger's arm bit me!" he said massaging his hand.

"Well no shit! It's robotic, and by the looks of it, home made." The other guard remarked, "Come on, don't be such a baby."

Snorting in disgust the guard lifted up the prisoner as the two of then proceeded to drag him to the medical wing.

The door opened as a team of scientists helped the prisoner up and onto the operating table, where the guards began to strap him onto the table. The scientists and doctors began to scamper to their positions around the table, their equipment at the ready.

"Hold up." One of the guards said raising his hand and halting the doctors, eagerly surrounding the prisoner, "The Illusive Man wants to be here to witness this operation." Obeying the command, the doctors took a step back and waited patiently.

"Sir." The other guard said snapping into attention as the Illusive Man entered the room.

"I want him awake for this operation." The Illusive Man said coolly nodding toward the unconscious prisoner. One of the doctors produced a syringe of adrenaline and injected into the arm of the prisoner.

The prisoner's green eyes snapped open as his head flew forward. His body began to work at overdrive trying to adjust to the sudden jolt of adrenaline. His arms and legs tried, desperately, to break through the restraints that locked him to the table. Quickly his eyes darted around the room trying to make sense to the new situation he was thrust into. His eyes immediately locked onto the Illusive Man.

"You." The prisoner said, his shaky body almost immediately halting, his eyes filling with anger.

"Welcome back Mr. Mason." The Illusive man said.

"I have nothing to say to you." Sean said, his eyes returning to the blinding light above him.

"You see, Sean," The Illusive Man began, ignoring the prisoner's response and stepping toward the operating table, "I put a large amount of money into your creation. Sadly, though, you were flawed. The chip we installed was far too weak, and easy to remove by surgery. This, on the other hand, won't be." He said railing up a small chip the size of his thumb. "Whether you want to or not you will fight for Cerberus."

"Are you done yet?" Sean asked indignantly.

"Always fighting until the end." The Illusive Man observed, "I admire that in a man. You'll be a valuable asset to our team." He then stepped away from the operating table. He nodded towards the doctors and they began their procedure.

Sean closed his eyes as he felt their icy instruments begin to cut his skin. He dared not scream. He didn't want to give the Illusive Man the satisfaction. He took a long and deep breath. The Illusive Man had won this battle, but the time would come when Sean could have his revenge.