The Imperium's Western Fringe Crusade discovers a remote planet and attempts to claim it for the Emperor. However, they encounter unusual local inhabitants, and they soon find that they are not the only ones who lay claim to this remote and strange domain....
MLP x Warhammer 40k Crossover

Twilight Sparkle was only a filly when Equestria detected the enigmatic Signal. A series of increasingly complex mathematical proofs, the Signal transformed from an intriguing curiosity to reliable evidence of extraequestrian life.

And as it happened, Equestria's exploration of their own solar system was nearly complete. With colonies orbiting every planet and large body, and an asteroid belt filled with miners and prospectors, Twilight's civilization was just about ready to turn its focus outward. The signal was less than ten light-years away, within reach of a daring, experimental voyage. A voyage Twilight Sparkle would lead.

Along with a small crew of the most skilled scientists and engineers Equestria could offer, Twilight is determined to uncover the mystery of the Signal, and brave the final frontier for future generations of Equestrian explorers.

A comment-driven, CYoA story. Please use the links provided in the author's notes of each chapter to vote, rather than the comments.

This story is a creative experiment of mine, one meant to explore the general idea that creativity is often most fostered by restrictions. As a result, I've imposed a number of restrictions on the writing of this story, which I'm stating explicitly here so I can be called out if I break any of them.

1. Brevity is the soul of wit
No chapter may be more than 1000 words long. This wordcount only includes prose, and not the questions/rolls.

2. Every choice matters
When a choice is offered in a chapter, at least one sub-optimal choice must be present, with no indication about which is which other than the prose itself. Every chapter should end with a CYoA-style decision tree when possible.

3. Fate is cruel and the universe is heartless
The decision of the vote must be respected. This means any character could be killed, or the entire story could end in failure, if that's what the votes decide. Where numbers, stats, and randomization appear in the text, these elements are not verisimilitude, but are decided by public diecrolls in my discord server.

Note: Because of the unusual production of this story, its chapters won't be edited in the same way as my usual fare. Feel free to point out any mistakes you encounter.

Awesome cover by Zutcha as you can probably tell. Editing stuff by Two Bit and Sparktail, where applicable.

With nothing happening, no world-conquering villains or Crystal Hearts being shattered and so on, Twilight is bored. She has nothing to do, plainly. But while in the middle of a drab reading session, she notices something doesn't feel right. Not to her, but in the night sky. She can't see it, but she can sense it. Something not from this world has entered her world, and it could be the first ever message from aliens.

And perhaps those aliens are trying to say hello.

(Btw, look up "Pioneer Probe Plaque" if you want the image described here. I can't post the actual thing because of mild nudity in it, but you can search it for context.)

(Review by PaulAsaran!)

Eighty years after the events of The Dread Chitin, Equestria is a radically different place. The arcane science of the late Duran Thirk and the information found on the Star League library core have combined to catapult the nation's science ahead by hundreds of years.

Now, facing the possible aggression of a completely unknown alien power, Twilight Sparkle and her friends have to gather together once more, leading a crew of the best ponies they could assemble in a voyage outside their own star system. They seek to learn about their potential foe, to explore the galaxy around them, and possibly find allies and friends to stand alongside them. Who knows what they will actually find?

Research log #579

It's been over one and a half years ago since the last activation of the device, though the magical signature hasn't changed it seems... weakened, to such a degree that the re-activation is impossible.

As described in the notes of research log #249 any attempt at providing the device an artificial source of magic to power failed, the device simply needed more energy than even the combined magical power of both Princess Luna and Celestia were capable of providing. You must be wondering now, I've already described these circumstances in previous logs so why bring it up now?

Simply said I'm out of options, every attempt of reactivating the device have failed and I'm only left with a single choice. I'm going to have to reverse engineer the device in an attempt to understand the mechanics with which it operates...

...At the risk of maybe never being unable to reconstruct it later.

I'm so sorry Fluttershy, I never should have involved you or any of the girls in the exploration of this structure. I hope that if we ever see you again you can find it in yourself to forgive me.

-Twilight Sparkle

In the true sense of Mass Effect, this story will be CYOA (Choose Your Own Adventure) giving you the reader the choice to decide the action of our protagonist.

I hope you enjoy!

Every chapter past chapter 27 was edited by gerandakis