FUNDEMENTAL, otherwise known as FPE-RPG is an FPE Fangame which takes place within the universe of Kaaatie's animation, that adds new characters, new lore, with a new UNDERTALE like twist, adding routes, and other UNDERTALE-like features and UI!
Just remember that
NONE OF THIS IS CANON!
If you want to stay updated on development, look at the Newsletters I make. They are seasonal, so expect them every now and then.