How much revenue did Undertale make?

$45.3M–$121.9M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Undertale sell?

Q: How many copies did Undertale sell?

16.5M to 26.8M copies, based on its 338k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 16.5M–26.8M; $45.3M–$121.9M after Steam's cut $82.4M–$187.6M before the cut; from 338k reviews (Overwhelmingly Positive)

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

Does this actually work?

We left Undertale out and predicted the genre from its 8 similar games. Every figure here, including Undertale's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 36.0M–48.4M

best case 132.9M (Grand Theft Auto V Legacy)

Games like Undertale

The middle of these games

≈ 36.0M–48.4M copies

≈ $454.9M–$833.4M after Steam's cut

from ~1.0M reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

All 8 of your similar games are hits.

Best case: Grand Theft Auto V Legacy at ≈ 101.3M–164.6M copies. A breakout hit, far above a typical game.

What it took to get here

About half the games that made it here had over 326k reviews in their first month; the spread ran 251k to 347k.

The genre you'd be entering

Your set: Your set clusters on Open World (5 of 8) and Mature (3 of 8).
The winners: Winners here lead with Open World + Crime. The breakout hits carry Crime + Automobile Sim + Third Person; a typical game here doesn't.
The era: The games you compared span 2015 to 2024, and 1 of your 8 shipped in the last two years.

How these numbers were worked out

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

Copies come from each game's reviews times a sales-per-review rate that falls with release age, from about 31 for the most recent game here to about 61 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
Grand Theft Auto V Legacy 2015	Est. copies ≈ 101.3M–164.6M 2.1x vs typical SteamSpy 50M–100M	Est. revenue Free	Free	2.1M reviews Very Positive	Open WorldAction
The Witcher 3: Wild Hunt - Complete Edition 2015	Est. copies ≈ 43.2M–70.2M SteamSpy 20M–50M	Est. revenue $593.9M–$1596.9M after Steam's cut $1079.9M–$2456.7M before the cut	$49.99	885k reviews Overwhelmingly Positive	Open WorldRPG
ELDEN RING 2022	Est. copies ≈ 28.6M–46.4M SteamSpy 20M–50M	Est. revenue $471.3M–$1267.1M after Steam's cut $856.9M–$1949.4M before the cut	$59.99	1.2M reviews Very Positive	Souls-likeOpen World
Red Dead Redemption 2 2019	Est. copies ≈ 26.2M–42.6M SteamSpy 10M–20M	Est. revenue $432.5M–$1162.8M after Steam's cut $786.3M–$1788.9M before the cut	$59.99	910k reviews Very Positive	Open WorldStory Rich
Wallpaper Engine 2018	Est. copies ≈ 30.8M–50.0M SteamSpy 20M–50M	Est. revenue $42.2M–$113.5M after Steam's cut $76.8M–$174.6M before the cut	$4.99	1.0M reviews Overwhelmingly Positive	MatureUtilities
Stardew Valley 2016	Est. copies ≈ 43.0M–69.9M SteamSpy 20M–50M	Est. revenue $177.4M–$476.9M after Steam's cut $322.5M–$733.6M before the cut	$14.99	1.0M reviews Overwhelmingly Positive	Farming SimPixel Graphics
Cyberpunk 2077 2020	Est. copies ≈ 24.2M–39.3M SteamSpy 20M–50M	Est. revenue $399.0M–$1072.8M after Steam's cut $725.5M–$1650.4M before the cut	$59.99	975k reviews Very Positive	CyberpunkOpen World
HELLDIVERS™ 2 2024	Est. copies ≈ 28.7M–46.7M SteamSpy 20M–50M	Est. revenue $315.9M–$849.4M after Steam's cut $574.4M–$1306.8M before the cut	$39.99	1.2M reviews Mostly Positive	Online Co-OpPvE