How much revenue did Iron Lung make?

$608k–$1.6M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Iron Lung sell?

Q: How many copies did Iron Lung sell?

277k to 450k copies, based on its 11k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 277k–450k; $608k–$1.6M after Steam's cut $1.1M–$2.5M before the cut; from 11k 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 Iron Lung out and predicted the genre from its 8 similar games. Every figure here, including Iron Lung's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 15.3M–52.2M

best case 98.8M (Tom Clancy's Rainbow Six Siege)

Games like Iron Lung

The middle of these games

≈ 15.3M–52.2M copies

≈ $112.5M–$375.9M after Steam's cut

from ~720k 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.

No genre covers most of your similar games. The closest is Co-op (4 of 8), so the genre you lead with is still undecided.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: Tom Clancy's Rainbow Six Siege at ≈ 75.3M–122.4M copies.

The genre you'd be entering

Your set: Your set clusters on Co-op (4 of 8) and Horror (4 of 8).
The winners: Winners here lead with FPS + Tactical.
The era: The games you compared span 2015 to 2023, and none of them 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
SCP: Secret Laboratory 2017	Est. copies ≈ 8.0M–13.1M SteamSpy 5M–10M	Est. revenue Free	Free	234k reviews Very Positive	Free to PlayMultiplayer
Lethal Company 2023	Est. copies ≈ 12.7M–20.6M SteamSpy 10M–20M	Est. revenue $34.8M–$93.5M after Steam's cut $63.2M–$143.9M before the cut	$9.99	511k reviews Overwhelmingly Positive	Online Co-OpHorror
DARK SOULS™ III 2016	Est. copies ≈ 18.3M–29.7M SteamSpy 5M–10M	Est. revenue $301.6M–$810.8M after Steam's cut $548.3M–$1247.4M before the cut	$59.99	439k reviews Very Positive	Souls-likeDark Fantasy
Tom Clancy's Rainbow Six Siege 2015	Est. copies ≈ 75.3M–122.4M 2.1x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	1.5M reviews Very Positive	FPSPvP
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
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
Ready or Not 2023	Est. copies ≈ 8.5M–13.9M SteamSpy 5M–10M	Est. revenue $117.4M–$315.6M after Steam's cut $213.4M–$485.5M before the cut	$49.99	344k reviews Mostly Positive	TacticalRealistic
Dead by Daylight 2016	Est. copies ≈ 38.7M–62.9M SteamSpy 20M–50M	Est. revenue $212.7M–$571.8M after Steam's cut $386.7M–$879.7M before the cut	$19.99	930k reviews Mostly Positive	HorrorMultiplayer