Undertale: Last Breath Unblocked

Undertale: Last Breath is a fan-made battle based on the popular Last Breath fan story, pitting you against Sans in a punishing fight.

How Undertale: Last Breath Plays

Dodge waves of attacks in the classic Undertale soul box and survive phase after phase. It is known for being very hard, so expect to learn the patterns over many attempts. The original was made in Scratch, and this web version keeps the same intense fight.

What Stands Out

• An intense Sans boss fight
• Undertale-style dodging
• Phases that get harder

Play Undertale: Last Breath Unblocked

It runs free and unblocked in your browser, with no download.

Press Start and face Sans.