How many copies has Undertale sold?

indielist estimates Undertale has sold between 16,927,869 and 39,498,361 units (median 28,213,115), derived from its 331,919 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.

Who developed Undertale?

Undertale was developed by tobyfox and published by tobyfox.

Who published Undertale?

Undertale was published by tobyfox, developed by tobyfox. See tobyfox's full catalogue and submission status on indielist.

When was Undertale released?

Undertale was released in 2015.

How many reviews does Undertale have on Steam?

Undertale has 331,919 Steam reviews, of which 97% are positive.

Is Undertale worth playing?

Steam players rate Undertale 97% positive across 331,919 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.

Undertale

Sep 15, 2015 Indie $9.99

Developer tobyfox Publisher tobyfox

Profile updated May 2026

This RPG, released in 2015, features a unique combat system where players can choose to defeat enemies or spare them. It has garnered significant attention, evidenced by over 290,000 Steam reviews. The developer is currently unknown.

Undertale is a 2015 Indie game developed by tobyfox and published by tobyfox. On Steam it has gathered 331,919 player reviews, 97% of them positive, which counts as a overwhelmingly positive reception among indie titles in the Indie category. The game is available on linux, mac, windows, and launched at $10. The pairing of developer tobyfox with publisher tobyfox is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Indie projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 16.9 million to 39.5 million units, with the full Boxleiter factor breakdown shown on this page rather than a single black-box figure. Within indielist's catalog of indie games mapped to their studios, publishers, and funding, Undertale can be compared against similar Indie titles and benchmarked on review counts and estimated sales.

Reviews

331,919

Positive

97%

Steam appid

391540

Engine

Unknown

Players (snapshot)

3,411

Fresh snapshot · 2026-07-24 14:10 UTC · 24h peak 4,380

Sales estimate

v1.0

16.9M to 39.5M

units (median: 28.2M)

≈ $96.6M to $225.4M modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)

16.9M median 39.5M

+ How is this calculated?

331,919 reviews × NB(85) = 28,213,115 median units

Factor	Adjustment
base	+50
year_2015	+30
price_$10	-5
positive_97%	+10
final NB	85

Heuristic display range: median × [0.6, 1.4]. Boundary protection: NB ∈ [15, 150].

Methodology & limitations

Sales estimates use an additive Boxleiter-derived heuristic against public Steam review counts. They are not authoritative sales data, and the fixed display range is not a statistically validated confidence interval. Actual results may fall outside it, especially for deeply discounted or bundle-heavy titles. Algorithm version v1.0. Read the exact method and validation status.

indielist estimates lifetime unit sales for Undertale at roughly 16.9 million to 39.5 million copies, with a median around 28.2 million, derived from its 331,919 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $161.0M in net revenue after Steam's 30% cut, regional pricing, and refunds. Unlike black-box trackers, the full calculation is shown on this page: a base review-to-sales multiplier is adjusted for release year, launch price, review sentiment, studio size, and genre, and every adjustment is listed so developers, publishers, and investors can audit exactly how the figure was reached. The range itself reflects genuine uncertainty — review-to-sales ratios vary widely between games — so indielist publishes a low, median, and high band rather than a false-precision single number, and treats free-to-play, heavily discounted, and bundle-distributed titles as having wider error margins still.

Price history

54 observed days · window low $2.49

Across 54 observed UTC days from 2026-05-31 to 2026-07-24, the daily lowest tracked USD price across stores ranged from $2.49 to $9.99. The tracked-window low was $2.49 on 2026-06-09.

Real store observations · daily lowest tracked USD price across stores · missing days are not filled.

Where to buy

Affiliate disclosure

Steam reference -75%

$2.49 Buy
GOG.com

$9.99 Buy
Green Man Gaming

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Fanatical

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Humble Store

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Latest tracked store observations (2026-07-24 04:48 UTC), cheapest first. Prices may have changed since observation. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.

Platforms

linuxmacwindows

Frequently asked questions

How many copies has Undertale sold?: indielist estimates Undertale has sold between 16,927,869 and 39,498,361 units (median 28,213,115), derived from its 331,919 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
Who developed Undertale?: Undertale was developed by tobyfox and published by tobyfox.
Who published Undertale?: Undertale was published by tobyfox, developed by tobyfox. See tobyfox's full catalogue and submission status on indielist.
When was Undertale released?: Undertale was released in 2015.
How many reviews does Undertale have on Steam?: Undertale has 331,919 Steam reviews, of which 97% are positive.
Is Undertale worth playing?: Steam players rate Undertale 97% positive across 331,919 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.

Players looking for games like Undertale can compare it on indielist against semantically similar Indie titles such as Kindergarten 2, DELTARUNE, OneShot, LISA: The Painful, ranked by shared tags and genre rather than by ad spend. On the developer side, tobyfox's other releases and tobyfox's wider catalog are one click away, letting developers benchmark where Undertale sits among a studio's body of work and how its publisher's portfolio performs. Because indielist maps studios, publishers, games, and funding into one connected graph, the same Undertale page serves three audiences at once: players hunting their next Indie game, developers studying how comparable projects were positioned and what they sold, and investors tracing which teams and labels are active in the space. A machine-readable markdown mirror of this page is published at the same path with a .md suffix for AI assistants, and its review, price, and sales-estimate figures are refreshed on a schedule rather than frozen at launch.

Matched from shared Steam tags and primary genre. Review count breaks ties; it is not a personal recommendation score.