Humanised Pathfinder RPG Crossover. Knowledge of Pathfinder not needed.

Canterlot, the glimmering jewel of the civilised world, throne city of the demi-goddess Celestia. No bastion of civilisation can match it and few try. Power is traded, bartered, stolen and forged in a thousand forms in the mad hive of life. Some are born to the power of a name, of a title. Some take power, ripping it from the world around them. Some are even gifted with power, for no better reason than that someone is willing to give it.

Some precious few, however, have power in their blood.

Twilight Sparkle, sorcerer and wizard both, seeks answers to her questions. Mysteries grow in the darkness beneath Canterlot, putting innocents at risk and threatening her home and her loved ones.

Rainbow Dash, thief and daredevil, dreams of the sky. Bound to the earth, she leaps between buildings and bounds across rooftops, forever searching for that elusive, fleeting sensation that plagues her as she stands on nothing and is held aloft no more than that.

Applejack, hunter and warrior, has fought. She has struggled, cutting down the aberrations of the Everfree with blade and arrow alike in a war her family has waged for generations. Fleeing from a failure, she seeks solace in the soft, civilised world. But not everything in Canterlot is as soft as she expected, and the cost of her failure may yet haunt her.

United by power, by ancient ties, the fate of not just a single city but an entire world rests upon their shoulders, and they don't even know it.
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Written in tribute/inspriation acquired from Nealend86's homebrew Pathfinder Sorcerer Pony Bloodlines.

Edited by the wonderful Nealend86 and excellent Web of Hope.

The cover art is a creation of Robd2003 over on deviantart, who kindly gave me permission to use it for my story. Go check out his stuff, it's amazing.

Edit: Now a collaborative effort with Loyal2Luna

Commander Shepard has been through a lot, but now that the Reaper War's over he can finally relax and take a little R&R, right? Soak up the sun, grab a few drinks, spend some quality time with Tali, introduce a new race to the galaxy... wait, what?

In the aftermath of the war, a new species has been discovered amidst the destruction and fire. A species that have access to powers never seen before, powers which could prove vital to the continuation of galactic survival.

The Citadel Council has elected to send Shepard, along with the rest of the crew of the Normandy, to introduce Equestria to the universe outside of their solar system.

Now Shepard must wade through obstructive bureaucrats, antagonistic journalists, and the odd, angry prince in order to bring Equestria into a new age of space and adventure.

So settle in, it's going to be one hell of a vacation!

Now has it's own TvTropes page

when the ponies first appeared, their offers of ponification and a simpler life in Equestria attracted people from all walks of life. This is one of those stories.

Bonus Chapter incoming!

An undead Emperor in need of a new body. A Spartan lost in space. A ragtag team on a suicide mission. What do they all have in common? They all wind up on the magical world of Equestria, where war has been forgotten. That, however, is soon about to change.
When each of them is about to be retrieved, ancient evils arise to unleash hell upon the unsuspecting world. When the forces of three galaxies clash around them, can our favorite ponies hold out against the onslaught?
This is a crossover involving Warhammer 40k, Halo, Mass Effect and MLP, and is also my first fanfic. Comments and reviews are welcome.
Rated T for language, violence, and general adult situations.
Now on Tv Tropes!

The potion used to transform people into ponies has gone through many, many interations. When one of the older potions is used, results aren't quite what was expected.

EDIT: I used a piece of fanart which I thought was wonderful as the cover image :3