I highly encourage you to listen to "Baptism" by Gary Schyman from the Bioshock Infinite soundtrack before you read. It'll get you in the right atmosphere :)

Chapter 1: A Reality

Bubbles burst through the shallow level of the river. Booker's eyes, blank and still, beneath the surface. I kept my hands pressed down, afraid of doing anything else.

I watched my father drown.

Slowly the other realities began to disappear. One by one, the Elizabeth's faded out of this dimension, to have never existed at all. Even when the doors were opened to me, when I figured out the truth, it still hadn't settled in. The truth was the truth. And if I were to set things right, I couldn't let my personal attachments interfere. But as I grew more alone, Booker's eyes stagnantly staring at me, I could no longer ignore the sorrow that had been stored away.

I felt a tear slide down. There was no fear as I saw the last Elizabeth disappear. I was ready. Allowing myself to hope. Hope that the realities change. Hope that maybe in a farther world, there was a Booker and an Anna who made all the right choices. Hope…

But nothing happened.

My eyes opened. I was still in the river, the sun now a crescent of light over the valley, the door still waiting for me on the low hill. Something in me caused me to stand up, the bottom of my dress darkened by the water.

"I…I don't understand…" I said aloud.

"Quite odd."

I whirled around. The Lutece twins were standing side by side— as always— behind me. Since it was Rosalind who spoke, Robert finished. "We thought you'd have figured it out by now."

There was nothing I could do but stare back, my brain being racked through to uncover some sort of explanation. And the omniscient tone of the twins didn't help matters.

"I…I don't—" Stuttering, I forced myself to stop. I sucked in a breath and tried again. "Why didn't I disappear like the others?"

"Constants."

"And variables."

The crease between my brows deepened. Their answer couldn't have been vaguer.

"Constants are specific," said Rosalind.

"However,"

"Like us,"

"You exist outside of the realities," Robert ended, tapping knowingly to his right little finger.

I glanced down to the silver thimble—a symbol for my deformity.

For all our deformities.

"But the other Elizabeth's—" I began to argue.

"Are not constant," Rosalind answered.

"They are the different outcomes of different realities," Robert explained.

"Variables."

Regardless, my head was shaking back and forth slightly, as if the motion would retrieve my thoughts in proper order. "I changed the course. I prevented everything from happening from both sides." Everything was still so tangled together, the knot making my head pound and making it unable to form a coherent conclusion. Everything but one, "I shouldn't even exist."

Rosalind inclined her head toward me. "By changing the course—"

"You've created a million worlds to take its place."

"Making the world you knew—"

"—Columbia in its entirety, your numerous involvements—"

"To have never existed at all." Rosalind's voice finished lightly.

More pieces formed, but none of it seemed to explain why I out of all the Elizabeth's was so special. And I asked them, "Why?"

Robert waved a hand at me. "You made the change."

"And therefore made a constant."

"One must exist." Robert practically shrugged. (I nearly envied how well they could handle the information. All the books in my library couldn't have prepared me for this).

Rosalind frowned, turning to her replica. "Well, technically speaking, there are no Elizabeth's."

Another truth. It was as though a great wind dispersed the fog that clouded around it in my head. No Elizabeth's. Only Anna's….

"But I do…" My voice sounded between a statement and question. Nothing was making complete sense.

"We—" Robert started.

"And you specifically—"

"—are unaffected"

My brow raised.

Rosalind noticed and continued. "Because you live within the tears—"

"You exist."

"But the life you know,"

"Did not."

"Does not."

"Will not," they said in unison.

The entire thing was making my head spin. All this information cramped together, making it difficult to sort through. But a part of me wanted to accept the twins' logic.

I took a deep breath, accepting this. And in doing so, the burden seemed to lift slightly. "Now what?" I asked them.

The Lutece's weren't exactly my friends. But in a way, we were in the same situation. They were the only ones who could relate, who knew my story. Maybe even better than I did.

"You continue forward."

"Or backward," Robert countered.

"Or forward."

He shrugged. "However way you wish."

"Anywhere?" The word itself seemed to so small in comparison to what it implied.

"Any when," Rosalind added.

"There are infinite possibilities."

"Hm," Rosalind's head tilted. "If only you had a way to access them all."

All. All the doors. Infinite and open to me. Despite my wondrous thought track, Rosalind's comment made me smirk. Booker always disliked their cryptic sarcasm—

"And what of Booker?" I asked suddenly, my focus taking a sharp turn as pieces of a theory clicked together. "He's a constant, isn't he?"

"Dewitt?" For once, Rosalind looked taken aback.

The other Lutece recovered faster. "I would suppose so…"

"No. He can't. He isn't." Rosalind argued.

"Is."

"The Booker's you took back several times," I interrupted, "to rescue me. They weren't the only ones." My eyes fell, realizing exactly what this meant. "There are others…" The Lutece's waited for me to finish my thought. "I changed both. I got rid of Comstack. Which means Booker…"

Robert cut in. "The one you know doesn't exist."

"Never has," Rosalind said.

"But one still does…" I retorted.

Doors flashed through my head, all different yet some similar. And there— Somewhere among the them, hidden by millions of others—

I didn't even check to see if the Lutece's were still there, my feet took off in a sprint. The skirt of my dress, still soaked from kneeling, weighed down my every step, but I barely paid mind to it. As the door opened to the Sea, I left this world behind me.

Goodness it took me days to make sense of that ending. But it was so worth it! Bioshock Infinite was amazing! Everything about it was so beautiful— the gameplay, the setting, the characters, the plot! Anyway, I really wanted to add this… extra epilogue. So I tried to fit it in as best I could with the actual facts of the game's ending. So there's a second chapter to this. But it's midterm season so… not sure when it'll be posted ^_^
But anyway, I truly hope you enjoyed reading. If some parts confused you feel free to ask, and if you simply liked it, feel free to review!
Thanks!

Are you going to just sit there?

As opposed to what? Standing?

Not standing, Reviewing!

Reviewing? I hadn't planned on it.

So you expect me to wait in vain for one?

No. But I do expect you to write another chapter.

And why is that?

Making this fanfiction was your idea.

My idea?

I made it very clear that I don't believe in the exercise.

Reviewing?

No. I imagine that's wonderful exercise for the brain.

Then what?

The entire commitment for the story.

(Excuse me, what are you guys talking about?)

One does not undertake a writing project knowing one won't receive good criticism.

One does not undertake a writing project knowing one may receive good criticism.

Can we just get back to writing?

I reckon you should. Otherwise you'll never finish this story...