Now here are the forms and which sans is available.
Undertale✔
Underfell✔
Underswap✔
Underwar ✔
Altertale✔
Aftertale
Swapfell
Oceantale
Outertale
Dancetale
Horrortale
Storyshift
Reapertale( @JacobTurkey)
Underfresh
And my own, bloodtale(me)
(Look at photo above and the book cover)
Oh also here is another one called underfnaf and the sans is ennard.
