The full storyline for Undertale Purple has been fully planned and written! A MASSIVE, MASSIVE thanks to PetertheMinion, my co-writer, for all of the awesome and creative ideas he has put forward, both for the game and the story! Seriously man, you are one talented person! Keep it up!

— 3JAD21, Main Dev

EDIT: The full Pacifist Route has been planned and written, we’re still working out the Neutral and Genocide Routes. (Plus others that we’re not gonna talk about here. :p)