==Originally written spring 2011== Equestria Daily Post==
GLaDOS is free of Chell, free to continue testing, when she discovers a portal gun Wheatley tried to repair with duct tape. When the portal gun catastrophically fails, the enrichment center, GLaDOS, and Chell are literally dropped in the middle of Equestria. The mute test subject soon finds the world of ponies far more welcoming than the human world. But GLaDOS sees possibilities. Let the testing begin... for science.

"Would you tell anypony if you knew the world was going to end, Twilight Sparkle?"

After a mishap involving the Transportalponder, the Courier finds himself in a place he doesn't recognize. With no way back and nothing else to do, he decides that wandering into the nearest town is the best option. Being the Courier, things aren't that simple...

A Fallout: New Vegas/My Little Pony: Friendship is Magic crossover

The style alternates between omnipresent third-person and the Courier recounting his tale to... Well, take a guess.

This story is a sequel to Too Shy for a Rainbow

If you liked this fic, check out the awesome Audio Dub version of it by The Lost Narrator!:
https://www.youtube.com/playlist?list=PLnqCBZacYIwK0xcHv85Lke-xFf5V9p7R4

It's been a month since Fluttershy and Rainbow Dash started dating. Everything was going fine until Fluttershy started experiencing horrific nightmares that started keeping her up at night. Looking for answers, Rainbow Dash, Fluttershy and Pinkie Pie seek out Twilight. But when the three mares find themselves within the world of Silent Ponyville, will things turn out for the better? Or will things end in tragedy?

Sequel: http://www.fimfiction.net/story/14866/Silent-Ponyville%3A-Reunion

Applejack finds a strange visitor in her apple orchard one day, with even stranger stories to tell...
MLP/L4D2 crossover. My first story on FiMfiction.net! May add more tags as story progresses.
Credit for the image goes to brokencreation on DeviantArt.