List of AU Path in order
1st: Undertale (By Toby Fox)

2nd: Undertale: Tears in The Rain (By Frostfm)

3rd: Undertale: Last Breath (by Zerjox)

4th: Dusttale (by Ask-Dusttale)

5th: Undertale: Indie-Pendence Duo (by EmptyAzurite)

Undertale: Independence is an undertale fan-made series, the story will tell you about Undertale Timelines that ended in a True-Pacifist Ending but The human decided to reset the timelines and done the genocide routes over and over, Sans The Skeleton who is one of the people that try to stop the human from doing the massacre, however, he usually ended up as he has been struck down but after many genocides route, with a mysterious reason, he has gained the power to acknowledge about the Timelines and reset make him has to confront many alternate timelines to has a happy ending with his friends again, However not only him that try to achieve that goal, other people that also acknowledge about this incident will also decide to make an action.

Undertale by Toby Fox
Undertale: Independence by EmptyAzurite