Quest — Undertale Heardle

What is Undertale Heardle?

Undertale Heardle is a free music quiz in the browser, inspired by Heardle: you hear 1 s of an Undertale & Deltarune track and guess the track title, with longer clips if you need them. Every day brings a new daily challenge, the same for everyone, plus a 30-level quest and unlimited free play.

How the Undertale Heardle quest works

The quest is a 30-level pass whose challenges rotate between game modes. You get one try a day, plus one if you beat the daily challenge, and every few levels unlock XP and cosmetics.

Three cups can also be played without limit: Novice (5 well-known tracks, 3 hearts), Veteran (8 tracks, clip shifted by 20 s, 2 hearts) and Final Boss (5 rare tracks, clip shifted by 15 s, 1 heart).

The music of Undertale and Deltarune

Toby Fox composed almost all of the music of Undertale and then the chapters of Deltarune, reusing his own leitmotifs from one track to another. There is no game to guess here: you go straight for the track title, which takes real knowledge of the soundtrack, from boss fights to area themes. Many tracks reuse the same melody with a different tempo or instrumentation, and Deltarune sometimes borrows motifs from Undertale. Chapters 3 and 4, released in 2025, add new areas and new fights. If two titles feel close, listen to the longer clip before answering.

Free, no sign-up

Heardles runs in the browser on phone and computer, with nothing to install. An optional account syncs your progress between devices.