How much revenue did Undertale make?

$45.6M–$122.6M 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?

16.6M to 27.0M copies, based on its 340k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 16.6M–27.0M; $45.6M–$122.6M after Steam's cut $82.9M–$188.7M before the cut; from 340k 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) 36.1M–48.6M

best case 133.0M (Grand Theft Auto V Legacy)

Games like Undertale

The middle of these games

≈ 36.1M–48.6M copies

≈ $456.1M–$836.2M 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 ≈ 101.4M–164.7M 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 ≈ 101.4M–164.7M 2.0x 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 ≈ 43.3M–70.4M SteamSpy 20M–50M	Est. revenue $595.5M–$1601.0M after Steam's cut $1082.7M–$2463.1M before the cut	$49.99	888k 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 ≈ 26.4M–42.9M SteamSpy 10M–20M	Est. revenue $435.5M–$1170.8M after Steam's cut $791.7M–$1801.2M before the cut	$59.99	917k reviews Very Positive	Open WorldStory Rich
Wallpaper Engine 2018	Est. copies ≈ 30.9M–50.1M SteamSpy 20M–50M	Est. revenue $42.3M–$113.8M after Steam's cut $77.0M–$175.1M before the cut	$4.99	1.0M reviews Overwhelmingly Positive	MatureUtilities
Stardew Valley 2016	Est. copies ≈ 43.2M–70.1M SteamSpy 20M–50M	Est. revenue $177.9M–$478.3M after Steam's cut $323.4M–$735.8M before the cut	$14.99	1.0M reviews Overwhelmingly Positive	Farming SimPixel Graphics
Cyberpunk 2077 2020	Est. copies ≈ 24.3M–39.4M SteamSpy 20M–50M	Est. revenue $400.4M–$1076.6M after Steam's cut $728.1M–$1656.3M before the cut	$59.99	979k reviews Very Positive	CyberpunkOpen World
HELLDIVERS™ 2 2024	Est. copies ≈ 28.8M–46.8M SteamSpy 20M–50M	Est. revenue $316.7M–$851.6M after Steam's cut $575.9M–$1310.1M before the cut	$39.99	1.2M reviews Mostly Positive	Online Co-OpPvE