look, since I'm not such a bad person I'll give you the titles of my own first aus and some fun facts :)
It is the first au that meets an opal.
It is a semi-genocidal route (despite the fact that several monsters were saved, it is not classified as neutral).
mettaton is the king of the underground and alphys is his right hand.
the human left and has not returned.
opal was part of the royal guard.
Since everything happened, the underground became darker, only the neon lights stand out.
It is one of the most pacifist timelines that has been entrusted.
In this place never went to war, therefore it has more kingdoms with multiple species.
The only human here is Chara.
This timeline will help Opal learn more about her species.
Stay tune for more facts and concepts 😉