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

Sans, you're a lazy sack of [SPOILERS] : r/Undertale

Undertale: I beat sans. Essential T-Shirt for Sale by Bingdom

Essential T-Shirt

Undertale: I beat sans. | Essential T-Shirt

What happens if you spare Sans in the final boss fight? - Quora

What are the requirements to fight sans in Undertale?

Greeting Card

Undertale: I beat sans. | Greeting Card

Undertale but monsters decided never return to the Surface. Some

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

What Makes Undertale One of the Best Games Ever? - G2A News

Undertale: I beat sans. Essential T-Shirt for Sale by Bingdom

Sans - Undertale Greeting Card for Sale by RaggdyMan