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

$695k–$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?

253k to 411k copies, based on its 4k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 253k–411k; $695k–$1.9M after Steam's cut $1.3M–$2.9M before the cut; from 4k reviews (Very 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 I Have No Mouth, and I Must Scream out and predicted the genre from its 8 similar games. Every figure here, including I Have No Mouth, and I Must Scream's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 3.9M–7.5M

best case 23.1M (Half-Life 2)

Games like I Have No Mouth, and I Must Scream

The middle of these games

≈ 3.9M–7.5M copies

≈ $42.1M–$69.6M after Steam's cut

from ~126k 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: Half-Life 2 at ≈ 17.6M–28.6M copies, ≈ $48.3M–$130.0M after Steam's cut.

What it took to get here

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

The genre you'd be entering

Your set: Your set clusters on Horror (6 of 8) and Survival Horror (5 of 8).
The winners: Winners here lead with FPS + Sci-fi, priced around $10.
The era: The games you compared span 2004 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 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–8.9M SteamSpy 2M–5M	Est. revenue $30.1M–$81.0M after Steam's cut $54.8M–$124.7M before the cut	$19.99	98k reviews Very Positive	Inventory ManagementSurvival Horror
Resident Evil 2 2019	Est. copies ≈ 6.4M–10.4M 1.8x vs typical SteamSpy 5M–10M	Est. revenue $70.1M–$188.4M after Steam's cut $127.4M–$289.8M before the cut	$39.99	221k reviews Overwhelmingly Positive	ZombiesSurvival Horror
Resident Evil 7 Biohazard 2017	Est. copies ≈ 4.3M–7.1M SteamSpy 2M–5M	Est. revenue $23.9M–$64.1M after Steam's cut $43.4M–$98.7M before the cut	$19.99	126k reviews Overwhelmingly Positive	Horror Survival Horror
Half-Life 2 2004	Est. copies ≈ 17.6M–28.6M 2.2x vs typical SteamSpy 10M–20M	Est. revenue $48.3M–$130.0M after Steam's cut $87.9M–$200.0M before the cut	$9.99	278k reviews Overwhelmingly Positive	FPSAction
BioShock™ Remastered 2016	Est. copies ≈ 2.7M–4.4M SteamSpy 2M–5M	Est. revenue $14.8M–$39.8M after Steam's cut $26.9M–$61.3M before the cut	$19.99	65k reviews Very Positive	FPS Story Rich
SILENT HILL 2 2024	Est. copies ≈ 1.6M–2.6M SteamSpy 500k–1M	Est. revenue $30.6M–$82.4M after Steam's cut $55.7M–$126.7M before the cut	$69.99	64k reviews Very Positive	Psychological Horror Horror
Black Mesa 2020	Est. copies ≈ 3.6M–5.8M SteamSpy 2M–5M	Est. revenue $19.7M–$53.0M after Steam's cut $35.8M–$81.5M before the cut	$19.99	145k reviews Very Positive	FPSRemake
Resident Evil 3 2020	Est. copies ≈ 3.1M–5.1M SteamSpy 2M–5M	Est. revenue $34.2M–$92.0M after Steam's cut $62.2M–$141.5M before the cut	$39.99	125k reviews Very Positive	ActionZombies