So Underswap End of the Dust is a dusttrust take that combines Underswap End of an Era, Dusttrust and Underswap Broken Promise.

The story-

After countless genocide routes Gerson have had enough and decided to tell Papyrus about the humans actions,

And that the only way he could stop the human's genocide is by getting stronger.

So Papyrus tried to kill everyone.

But he tried to avoid sans at all cost,

But sans tried to stop Papyrus but couldn't So he realized that the only way he could stop Papyrus is by killing him.

And that is what he did.

But after he killed Papyrus Gerson went to sans to tell him the same as he told Papyrus.

And told him that killing the human would be the only way to get Papyrus back.

Made up QNA:

Will this be a fangame?

No.

Where will you fight sans?

In the throne room.

Don't we have enough dusttrust takes?

Yes absolutely.

Why is it Gerson and not the River Person?

Because Gerson swaps with Gaster in Underswap End of an Era.

And that is everything thing about Underswap End of the Dust I hope you liked it!