Can I beat Sans Undertale and still get a refund?

Is it possible to buy Undertale, play through the entire game and beat the hardest bosses, and still be able to refund the game on Steam?~~~Music - Undertale

Epic Undertale Canvas Art: Undertale's Anime Aesthetic: Stunning Canva

What Happens If You Kill Sans, Then Change To The True Pacifist

A message from Sans : r/Undertale

How to Beat Sans: Followup

UNDERTALE: Second chances in morality, by Matt Leslie

Sans! This is no time for games, we have to get back to work! : r

Greeting Card

Undertale: I beat sans. | Greeting Card

Undertale, but AI writing made it TERRIBLE

Undertale: I beat sans. Spiral Notebook for Sale by Bingdom

Don't even try to disagree : r/Undertale

Undertale Genocide run explained: How to play the game in the most

Undertale Neutral Ending Speedruns - shayy on Twitch

Sans - Undertale Metal Print for Sale by RaggdyMan

The Uprising - cover page : r/Undertale

Endings - Undertale Guide - IGN