This story is a sequel to Princess Twilight Sparkle's 500th Birthday

Five years have passed since the events of that fateful morning. Smarty Pants and her friends set off on an adventure of a lifetime to discover the secrets of the past when they awaken a… oh wait, that would be spoiling it!

Many questions from the first story will be answered! New questions will arise. Lunch will be had, pies will be thrown, blood will be kept inside bodies because seriously, ew blood, you guys.

Notes:
- Cover art commissioned by HAK2. Check out his other stuff, too.
- This is a story in the Birthdayverse.
- This story was written and completed (except for the epilogue) before Season 4 of MLP:FiM aired.
- Many thanks to my faithful Pre-Reader and all around super-duper best pony, Blood Lord go read his story, too!

Twilight has something she needs to tell Princess Celestia--something that means a chance at getting everything she's ever wanted, or of losing everything she's ever had.

Something so terrifying that the only way she could say it was in a letter...and so wonderful that she had the courage to send it.

(Thanks to Cenit V for the cover!)

This story is a sequel to Upheaval: Breaking Point

Following the events of Breaking Point, Twilight Sparkle and her friends discover that Equestria's demise may not come from an enemy invasion, but from within. The Barrier Lands and the Heartland begin the slow and uneasy process of reuniting into a single Equestria, but this long-delayed joining is already in danger at its conception.

With Celestia's power in her grasp and her agents by her side, the wheels of Black Rose's plans for Equestria's future continue to turn. However, her brazen gamble has done more than just bring down a centuries-old barrier. Ancient powers begin to stir: the remnants of a dark period in Equestria's history, the immortal inhabitants of Celestia's homeworld, and a rising tide of darkness coming ever closer.

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

(Second Person Story)
You are a human who has found himself in Equestria. As if that wasn't bad enough, you're not quite as tall as you were when you started, and not only have to survive at a greatly reduced size, but then you have to live with it. Of course, Equestria is a place where there's always somepony willing to lend a helping hoof, and so you never lack for support. But what can they do for you really, if they can't make you bigger, or get you home? As the tale goes farther, you begin to question if you even want to go home, and then the ultimate question is asked; Can you earn your happy ending? Read and find out.