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 to play Undertale Heardle

Press play to hear 1 s of a track, then type the track title. Not sure? Unlock a longer clip (1 s, 3 s, 6 s and 12 s): the sooner you answer, the more points you score (4, 3, 2, 1). You start with 3 hearts and lose one per mistake.

Free play has several modes: Classic, Sudden death (one heart), Time attack (90 seconds), Reverse (find the right clip among three) and Single game. Correct answers in a row build a combo, and the best scores go on the leaderboard.

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.

251 tracks from 4 games: Undertale, Deltarune Chapter 1, Deltarune Chapter 2 and Deltarune Chapters 3 & 4.

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.