# Undertale

> Undertale passed one million sales as fan art, playthroughs and forum voting spread.

- Owner: Toby Fox
- Kind: Game
- Sector: Gaming
- Seed date: 2015-09-15
- Observed peak date: Week of Jan 19, 2016
- Date basis: Observed peak within the documented measurement window; not an all-time maximum. Dates use the stated precision; chart positions are date anchors.
- Spread Score: 56 (Notable), v1.2
- Mechanics: Underdog, Identity badge, Fandom mobilisation, Platform jump, Press loop

## Summary

Fox crowdfunded Undertale, then released it in September 2015. Fan comics, YouTube playthroughs and a GameFAQs voting campaign spread it beyond players. Sales passed one million in early 2016; Deltarune and orchestral concerts extended its afterlife.

## Timeline

- 2013-05-23 — Toby Fox (Open web) — Fox released the Windows demo and asked players to tell their friends.
- 2013-06-24 — Toby Fox (Open web) — Fox announced the Kickstarter and a Macintosh version of the demo.
- 2013-07-24 — Kickstarter backers (Open web) — The Kickstarter closed with $51,124 pledged by 2,398 backers.

The full timeline, metrics and sources are on the case page, or via the Pro API (https://howitspread.com/developers).

Canonical URL: https://howitspread.com/cases/undertale

Cite as: How It Spread (2026). “Undertale.” Case HIS-01336. Spread Score v1.2: 56/100. Updated 2026-10-22. https://howitspread.com/id/HIS-01336