Master Chief Petty Officer John-117 was stranded on the half destroyed Forward Unto Dawn due to a slipspace malfunction for several years. He finally wakes up when a nearby inhabitable planet was detected by what was left of the ship's electronics.

No point on staying on a half destroyed ship.

EDIT: Okay, how did this story receive more likes than dislikes, and more than 10000 total views?

Archer and his "friends" are enjoying a relaxing and uneventful day at ISIS. That is untill a package from russia comes and hits them with a rainbow bomb that sends them flying to god knows were and when in the universe. And were else whould they show up but equestria. Now they must either adapt to life here or get back home. With archer involved, either option won't end well.

It was an average day for Shor Vadum zealot and descendant of Rtas Vadum who served as a fleet master in the covenant civil war.
Shor was trained in every weapon system in the galaxy and is the youngest ship master to ever serve in the human-sangheili alliance. But not even the
training of both the strongest forces in the galaxy can prepare him for today. This day will change the rest of his life.
How will he react when a world full of talking ponies needs protection and how will they react to him?

Halo crossover

more parts on my deviant art
carmine30
parts are unedited

"Whatever you do, don't touch anything, don't look at anything, don't breathe on anything!"

During his exploration of the Freelancer base, Caboose stumbles upon a lab of experimental Slipspace technology and does what he does best: pushes buttons. The next thing he knows, he's in a strange place talking to a tiny yellow filly and he couldn't be happier!

Inspired by DarkWing's My Little Caboose: Blue is Magic! If you think this is good, you might like My Little Caboose even more!

A crossover of Red Vs Blue - the Halo Machinima series - and My Little Pony: Friendship is Magic, primarily starring Epsilon, who is recaptured within the Epsilon Unit and finds himself in the land of Equestria. Will the resident ponies and him become best friends, or will the situation degrade into a flurry of insults?
Hedge your bets, folks.

Fry from Futurama goes to sleep and wakes up in Equestria.

An elite team of seven ODST are sent to sabotage a Covenant Super Carrier when things take a turn for the worst: the carrier sets off radiation and jumps into slipsace, sending the seven into an unkown land of Equestria. They are scattered far and wide, with no knowledge of each other's lives. The land is inhabited by talking horses and the seven need to figure out what went wrong and not get banished by the local monarchy by sudden infiltration on her land. They seven also are known to be 'The Squad' and will they get back to New Mombasa and stop the glassing of it?