So Twilight's off to Crystal Empire to visit her brother, Shining Armor, her sister-in-law, Princess Cadence and her parents who are also visit the couple, leaving the rest of the mane 6 in Ponyville. 2 days after Twilight's departure from Ponyville, an outbreak of a mysterious virus known now as the 'Green Flu' spreads rapidly all across Equestria. The remaining of the mane 6, excluding Fluttershy who has somehow been missing since the outbreak, have to team up and find the cure, the cause or at least a safe place from this outbreak. Their bonds of friendship will really be put to the test as they fight these zomponies to stay alive.

Contains: Some blood and gore and some vulgarities here and there. References from the Left 4 Dead franchise, viewer is advised to have some knowledge of the game, to help you understand the story better.

Note: Sort of a crossover with Left 4 Dead 2. As for where and what happened to Fluttershy, I may write a story about that soon, depending on how well this story goes. Oh and i started with Left 4 Dead 2 first because i wanted to focus on the remaining mane 6 first and i felt that they represent the survivors in Left 4 Dead 2 more than in the first one. As for the the first Left 4 Dead, ideas are still being brainstormed. And ponies can shoot guns, meh.