A certain handsome rogue lives in plain sight in Equestria, with no one the wiser.

Equestria has resources not found in any other dimension, so of course an alcoholic, mean-spirited scientist would get in on that and drag his grandson along for the ride.

A portal to Equestria opens on Arstotzka's border, and you now have to deal with pony immigrants along with the usual mix.

Sequel to Mission: Improbable starring the Scout.

A group of robbers end up at ground zero of Earth and Equestria having portals opening between them. The robbers blend in with the crowd and bide their time; at least, until they decide that Equestria has some nifty things to steal...

After destroying Hell, Doomguy tries to go back home, but ends up in Equestria.

Naked Snake escapes from captivity in Groznyj Grad, only to find out that he's not quite in Russia anymore.

Pinkie Pie meets some new friends, and they bond over silly friend things, like cooking, telling jokes, racking up debt, and calling the fire department.

A Killing Floor game unfolds in Ponyville, much to the inhabitants' horror and confusion. Also, nopony is hurt because reasons.

You play poker with Rarity, Medic, Mr. Foster, and Strong Bad (again). Then you come back and play another poker game.

Anon finds out that ponies have never heard of drifting, and so he sets out to educate them.

What would happen if Twilight Sparkle, instead of learning the magic of friendship, just had a gun?

Equestria is facing a potential crisis involving distorted reality based on cognition. Celestia tells an old friend, who has just the solution for her...

The city of Inkopolis is dropped on the shore of Equestria thanks to some faulty science. Both parties do their best to adapt.

Doomguy, Duke Nukem, BJ Blazkowicz, the guy from Marathon, Chexguy, the mage from Heretic, the cleric from Hexen, and Quakeguy all stumble into Equestria. Hijinks ensue.