Twilight Sparkle perfects a spell which allows cross-universe travel. But the wacky hijinks don't just make the reader laugh-they also attract the attention of the Combine Army, the mighty military arm of an alien empire! How will the Mane Six deal with these new enemies? And who else will cross the barrier between the worlds?

John Sparkle has to make the ultamate choose to save pones and Littlepip Sparkle

Littlepip Sparkle has to fight Zebras and save pone kind

John Sparkle has to kill evil next boss and live up to fullpony consequences

John Sparkle who is Twilight Sparkles brother has to do what has to be done and help Twilight Sparkle defeat the enemys

its a fanfiction crossover with ponys and half life based on quarter-Life by Peter CHimaera

Gordon Freeman and Ditzy Doo have had so much taken from them by That Thing that pretends to be a man. They have had enough. This is their journey. This is their folly. This is their only hope. This is their desperate quest: To Slay a God.

Me and the guys are back, with some new allies, new enemies, and a better f*cking rating. PG13, but recommended for M in the case of Death, Shipping, and Grimdarkiness. We also blatantly fail at entering Equestria without a giant swarm of alien soldiers.