How much revenue did I Have No Mouth, and I Must Scream make?

$704k–$1.9M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did I Have No Mouth, and I Must Scream sell?

Q: How many copies did I Have No Mouth, and I Must Scream sell?

256k to 416k copies, based on its 4k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 256k–416k; $704k–$1.9M after Steam's cut $1.3M–$2.9M before Steam's cut; from 4k reviews (Very Positive)

Copies are estimated from the public review count, adjusted for release year, and cross-checked against SteamSpy's own estimate.

Did the prediction match what actually happened?

We hid I Have No Mouth, and I Must Scream and predicted how it would do from its 8 similar games. Every figure here, including I Have No Mouth, and I Must Scream's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 4.0M–7.6M

best case 23.2M (Half-Life 2)

Games like I Have No Mouth, and I Must Scream

A typical game among these

≈ 4.0M–7.6M copies

≈ $42.5M–$70.3M after Steam's cut

from ~127k reviews

Only the top fifth of 2019's Steam releases earned $34k or more before Steam's cut, so plan for that or less.

All 8 of the similar games are hits.

Best case: Half-Life 2 at ≈ 17.7M–28.8M copies, ≈ $48.6M–$130.7M after Steam's cut.

What their first month looked like

About half the games that made it here had over 26k reviews in their first month; the range was 24k to 32k.

The genre you'd be entering

These games: The similar games share Horror (6 of 8) and Survival Horror (5 of 8).
The winners: Winners here lead with FPS + Sci-fi, priced around $10.
When they shipped: The similar games span 2004 to 2024, and 1 of the 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 79 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
Resident Evil 4 (2005) 2014	Est. copies ≈ 5.5M–9.0M SteamSpy 2M–5M	Est. revenue $30.4M–$81.7M after Steam's cut $55.2M–$125.7M before Steam's cut	$19.99	99k reviews Very Positive	Inventory ManagementSurvival Horror
Resident Evil 2 2019	Est. copies ≈ 6.5M–10.5M 1.8x vs typical SteamSpy 5M–10M	Est. revenue $70.9M–$190.7M after Steam's cut $129.0M–$293.4M before Steam's cut	$39.99	224k reviews Overwhelmingly Positive	ZombiesSurvival Horror
Resident Evil 7 Biohazard 2017	Est. copies ≈ 4.4M–7.1M SteamSpy 2M–5M	Est. revenue $24.1M–$64.9M after Steam's cut $43.9M–$99.9M before Steam's cut	$19.99	128k reviews Overwhelmingly Positive	Horror Survival Horror
Half-Life 2 2004	Est. copies ≈ 17.7M–28.8M 2.2x vs typical SteamSpy 10M–20M	Est. revenue $48.6M–$130.7M after Steam's cut $88.4M–$201.1M before Steam's cut	$9.99	280k reviews Overwhelmingly Positive	FPSAction
BioShock™ Remastered 2016	Est. copies ≈ 2.7M–4.4M SteamSpy 2M–5M	Est. revenue $14.9M–$40.1M after Steam's cut $27.1M–$61.7M before Steam's cut	$19.99	65k reviews Very Positive	FPS Story Rich
SILENT HILL 2 2024	Est. copies ≈ 1.6M–2.7M SteamSpy 500k–1M	Est. revenue $31.4M–$84.4M after Steam's cut $57.1M–$129.8M before Steam's cut	$69.99	66k reviews Very Positive	Psychological Horror Horror
Black Mesa 2020	Est. copies ≈ 3.6M–5.8M SteamSpy 2M–5M	Est. revenue $19.8M–$53.2M after Steam's cut $35.9M–$81.8M before Steam's cut	$19.99	145k reviews Very Positive	FPSRemake
Resident Evil 3 2020	Est. copies ≈ 3.1M–5.1M SteamSpy 2M–5M	Est. revenue $34.6M–$93.1M after Steam's cut $62.9M–$143.2M before Steam's cut	$39.99	127k reviews Very Positive	ActionZombies