AN: I am proud to present to you the first ever Prototype and BioShock: Infinite crossover. Not sure if Vigors would work on Alex since it was made for humans to use. Besides, he's already a one-man army so doesn't even need them.

This takes place after the first [Prototype] game and during the events of [Prototype 2]: The Anchor. It explains what happened to Alex to make him lose his faith in humanity.

This one-shot is dedicated to luigimalefico.

Infinite Blacklight

Humans were selfish.

That was the truth that Alex Mercer learned on his journey around the world for something to believe in. He realized that human beings only pretended to treat others with decency. All they cared about were their individual freedom and their lives.

He then returned to the US and liberated a small town from a drug cartel on his way. While the town celebrated their freedom from the cartel, Mercer knew that they celebrated their individual freedom and none of them cared about others. He traveled north and found many incidents of humans ignoring their own kind. He witnessed men killing innocent people for profit, families abusing their own kin, and corruption in every government establishment.

Mercer decided that he had enough of human interaction and chose a life of solitude.

He went further up north and rented a cabin. There, he had established a new face and identity with the money that he stole from the drug dealers he killed. He introduced himself as Jack to Flint and his daughter, Autumn, while renting a cabin from them.

If Mercer were to continue to live there, trouble would arrive in the form of Zurich, Flint's former business partner who wanted the lands around Flint's lumber mill.

Flint would then deny selling his land to him, making Zurich send two thugs to kill him and Autumn. However, Alex would intervene and kill Zurich himself. Alex will then discover through Zurich's memories that Flint was once a criminal involved in many murders and extortions. Enraged and disappointed, Alex would return to Flint's cabin and kill him despite Flint's insistence that he had left his past behind.

Still in disguise as Jack, Alex would return to his cabin to find Autumn there and attempt to convince her to come with him, only to discover that Autumn had stolen his money. Autumn will promptly shoot Alex in the face and reveal that her father had taught her better and that she cared about herself above anything else. To her surprise, however, Alex's regeneration would kick in, allowing him to consume her. He would finally decide once and for all that humanity was worthless and that it was his duty to destroy them and usher in a new and better world.

That is what would have happened in that universe. But things for Alex Mercer in this universe happened a bit differently.

00000

Alex Mercer was preparing himself for dinner at Flint's cabin when he heard the ringing of his cellphone. He frowned as he wondered who could be calling him since he didn't give anyone his number.

Only one person knew his number and that person were only supposed to call him when there was an emergency.

He picked up the receiver and placed it against his ear.

"Hello," he answered.

"Is this line secured?" a very familiar masculine voice asked.

"Ragland?" Mercer almost blurted out the name of the scientist who helped him back in Manhattan. He had also left his comatose sister in the former Gentek scientist's hands. For almost two years, Dana's condition remained unchanged.

He wanted to check up on her everyday, but he knew that the military could trace the call and storm in on their location if any of their names were mentioned even for a second on an unsecured line.

"Give me a minute," the scientist told him. He then heard a click on the other line, "There, now we can talk without the government breathing down our necks."

"Is anything wrong with Dana? Did Blackwatch find her?" he growled, his biomass bristling at the thought of his baby sister in any danger. He may not care about humanity but he would always worry for her safety. He wouldn't have rescued her from Greene at the Infected Lair and detonated the nuke away from Manhattan if he felt otherwise.

"No but she doesn't have much time."

"Explain. Now."

And explain he did to the living bioweapon in hiding.

00000

Alex burst out the door before Ragland had a chance to finish his sentence. Not like the former Gentek scientist could since Alex crushed the cellphone in his hand.

The living bioweapon didn't care that he dismissed his Jack disguise and shifted back into Alex Mercer. He didn't care that people saw him sprint at superhuman speeds and perform spectacular feats without even trying. None of that mattered to him except for getting back to New York on time.

He didn't know or cared how long he ran, but he eventually reached his destination. He found Ragland's safe house in no time and he nearly tore the door off its hinges when he went inside. The doctor wisely jumped out of his way as he stomped to where Dana was being kept.

The room was sterile white with medical equipment by the walls. But he focused on the bed where his sister was in.

His breath that he didn't really need hitched up in his throat at the sight of her. Her skin had a very sickly pallor even more so than his skin. Every breath she took appeared to cause her intense agony and the bags around her eyes looked like they were permanent.

Alex barely heard Dr. Bradley Ragland giving him a more detailed explanation concerning Dana's illness as he knelt by her side. But he got the gist of it.

The virus that Greene had infected her with was causing her body to degenerate down to a genetic level. The way that the virus behaved was like cancer cells but a thousand times more potent. Any medical treatment only served to make her condition worse.

Dana was dying and there was nothing that he could do to stop it.

He could hear the consciousness of Elizabeth Greene laughing at his weakness. He could hear her gloating over his sister's imminent demise and her rant about how he should have joined the Infected when he had the chance.

He pushed the lingering consciousness of the former Infected Leader back down when he couldn't take it anymore. He then ran out the building in an attempt to clear his head.

"Dammit!" he exclaimed, stopping as he punched a nearby wall hard enough to shatter the bricks and mortar beneath it, "C'mon, there must be something that I could!"

There was one way though. He could infect Dana with the same virus that changed him. It could save her but he would be going against what he swore never to do and that was to spread the virus. He also couldn't turn his sister into the same monster that he was.

Dana was his last connection to humanity and the only reason why he didn't try to wipe out the humans. If he were to infect her, she will no longer be human. If she died, his last ounce of humanity will die with her. Damned if he did, damned if he don't.

"Think, Mercer! THINK!" he shouted as he smacked his palm against his forehead, causing loud bangs to echo around him, "C'MON! YOU SURVIVED A FUCKING NUKE SO WHY CAN'T YOU THINK OF A WAY TO SAVE HER!"

"Oh how the mighty have fallen," a female accented voice said, "It seems there are things that even Zeus can't hope to stand up against, brother."

"Give Dr. Mercer a break, sister," a male one this time chided, "Would you not feel the same if you ever lost me? I know I would if something were to happen to you."

He looked up to see a man and a woman. The man wore a fine sit with dark brown pants, a light tan overcoat, a dark tan vest underneath, white-collar shirt, and a blue tie. The woman was dressed identically with the only real differences was that she had an ankle length dark brown skirt. Both the man and woman had red hair and regarded the Prototype with blue eyes that betrayed no emotion. They looked like they were twins with the matching facial features so it was safe to assume that they probably were twins.

Alex didn't give a fuck that their clothes were very old-fashioned. He didn't give a fuck that these two somehow got close to him without him noticing. He didn't give a fuck that they knew who he really was. But there was one thing that he did give a fuck about.

"Who… are you?" he rasped out as he glared at them.

"You wish to know who we are when the more important question is where you're going," the woman said.

"I on the other hand, disagree with you, sister," the man who was obviously her brother remarked, "Dr. Mercer's question pertaining to who we are is just as important to where he will be going."

Tendrils snaked across his body as sprang up, reverting him to the hooded visage of Alex Mercer. But the tendrils didn't stop there as the Biomass in his arms shifted into 4-digited, talon-like appendages that can be used to shred flesh and bone.

"WHO THE FUCK ARE YOU PEOPLE!" he roared as he crouched in a predatorily stance with claws extended, "AND WHAT THE FUCK DO YOU WANT FROM ME!"

"It is not about what we want from you," the woman retorted.

"It's about what you want from us," her brother added, catching Mercer off guard.

"What?" he snarled as his claws twitched in anticipation for blood.

"You went on a journey in search of faith in humanity and became very disappointed by what you saw."

"And now one of your last connections to human beings is about to be abruptly cut off."

Deciding that he heard enough, he pounced at them and swiped his claws for a swift dismemberment. He grinned in satisfaction as his talons cut through their flesh and bones.

"And that's that," he said, dismissing his claws.

"Guess again."

He turned his head so fast that it would have given an ordinary human whiplash. To his utter disbelief, the twins were still very much alive.

"What the hell…"

It was impossible. He could have sworn that he killed them. It hadn't been a minute since he felt his claws cut through their bodies like an apple. So why the hell were they still living!?

Angered at the continued existence of his preys, he brought out his claws again and began hacking away with homicidal determination.

No matter how much he tried; the twins weren't at all bothered by the many attempts on their lives. Even their clothes looked no different than what they first appeared in. In fact, they looked almost amused as he swiped at them with razor sharp claws.

"We could do this all day," the woman said, still capable of speech despite of the bladed appendage impaling her throat, "But can you?"

"Yes. Yes, he can," the man replied as Alex wrapped his claws around his head and crushed it, "You're forgetting that he doesn't need to rest like humans do."

"But he will tire of this eventually and ceased his attempts on our lives."

"What the hell are you two!?" he demanded as he buried his claws to the wrist in their chests.

The woman carried on, ignoring the arm that was sticking out of her torso. "Merely visitors. A wisp of smoke that is soon forgotten. But unlike smoke, we have far more purpose here than you know."

"And our purpose here is to offer you a choice. A chance to regain your faith in humanity."

Alex removed his claws from their chests and changed them back into hands since he figured it was futile to continue.

"Hmph, good luck with that," he scoffed as he crossed his arms.

"Would providing your sister with a cure for her condition be an excellent start?" the woman suggested, once again catching him off guard.

It seemed to good to be true. Just when his sister was dying, these two showed up with an offer to cure her. Even though he knew next to nothing about these twins, there was always one thing that everyone had: an ulterior motive.

"What's the catch?" he asked, tone laced with suspicion.

"It's simple really," the woman said as a shudder in the air passed over them before the very air pulled apart behind the twins as if the fabric of reality had just been torn asunder.

"Holy shit!" he exclaimed, jumping back. He then bent his knees to a crouch as his right arm transformed into a giant blade that was as long as he was tall.

"Before you lies a chance to reconnect with humanity. Bring us the girl and wipe away the debt."

"But make sure that you bring the girl back in one piece so no mutilation of any kind and that includes consuming," her twin added.

He straightened himself up while changing his arm back to normal. "So you want me to walk into a hole that leads to God only knows where and bring you some girl relatively unharmed? Is that it?"

"That is all worth mentioning at the moment if you accept."

"…I do this and you guys can cure Dana?"

"That is correct."

Normally, he wouldn't trust anyone shady like these twins but he figured that he didn't have much to lose since they clearly weren't human. Or at least not anymore.

"Let's get this over with," Alex said as he walked past them.

"Enjoy your time in Columbia, Dr. Mercer," was the last thing that he heard before stepping through the tear in reality and didn't look back.