The extra option

Chara

You reached the absolute. There is nothing left for you here.

Chara

Let me ask you a question. Partner.

Chara

Should we erase this pointless world and move on to the next?

Frisk

Actually... I have a better idea.

Frisk

What if we did a pacifist route instead? Nobody gets hurt...

Frisk

And I could give you this chocolate bar.

Chara

...chocolate?

Chara

(It's been so long since I've tasted chocolate...)

Chara

One chocolate bar for sparing an entire world? That's hardly a fair trade.

Chara

Make it forty chocolate bars and we'll have a deal.

Frisk

Deal! Forty chocolate bars it is!

Chara

Fine. We'll try your "pacifist route"...

Chara

For now. But I expect premium quality chocolate, partner.