How many copies did Hammerfight sell?

131k to 213k copies, based on its 2k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Hammerfight make?

Hammerfight is free to play, so there is no copy-sales revenue to estimate.

How big is Hammerfight?

Estimated players who have it: ≈ 131k–213k; from 2k reviews (Mostly 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 Hammerfight and predicted how it would do from its 8 similar games. Every figure here, including Hammerfight's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 5.4M–12.6M

best case 105.1M (Garry's Mod)

Games like Hammerfight

A typical game among these

≈ 5.4M–12.6M copies

≈ $38.9M–$83.6M after Steam's cut

from ~175k 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: Garry's Mod at ≈ 80.0M–130.1M copies, ≈ $219.9M–$591.3M after Steam's cut. It is a breakout hit, far above a typical game.

The genre you'd be entering

These games: The similar games share Sandbox (5 of 8) and Physics (4 of 8).
The winners: Winners here lead with Sandbox + Moddable, priced around $10. The breakout hits carry Casual + First-Person + Moddable; a typical game here doesn't.
When they shipped: The similar games span 2006 to 2021, 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 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
Stick Fight: The Game 2017	Est. copies ≈ 4.3M–7.0M SteamSpy 2M–5M	Est. revenue $5.9M–$15.9M after Steam's cut $10.8M–$24.5M before Steam's cut	$4.99	125k reviews Very Positive	MultiplayerFunny
Garry's Mod 2006	Est. copies ≈ 80.0M–130.1M 7.2x vs typical SteamSpy 20M–50M	Est. revenue $219.9M–$591.3M after Steam's cut $399.8M–$909.6M before Steam's cut	$9.99	1.3M reviews Overwhelmingly Positive	SandboxModdable
Fall Guys 2020	Est. copies ≈ 11.6M–18.9M 2.7x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	468k reviews Very Positive	MultiplayerParty Game
People Playground 2019	Est. copies ≈ 9.2M–15.0M 1.8x vs typical SteamSpy 5M–10M	Est. revenue $25.4M–$68.2M after Steam's cut $46.1M–$104.9M before Steam's cut	$9.99	321k reviews Overwhelmingly Positive	SandboxGore
Human Fall Flat 2016	Est. copies ≈ 9.5M–15.4M SteamSpy 10M–20M	Est. revenue $52.0M–$139.7M after Steam's cut $94.5M–$214.9M before Steam's cut	$19.99	227k reviews Very Positive	Co-opFunny
Space Engineers 2019	Est. copies ≈ 3.9M–6.3M SteamSpy 2M–5M	Est. revenue $21.3M–$57.3M after Steam's cut $38.7M–$88.1M before Steam's cut	$19.99	135k reviews Very Positive	SpaceSandbox
Totally Accurate Battle Simulator 2021	Est. copies ≈ 3.8M–6.2M SteamSpy 2M–5M	Est. revenue $21.0M–$56.6M after Steam's cut $38.3M–$87.1M before Steam's cut	$19.99	154k reviews Overwhelmingly Positive	SandboxSimulation
Assetto Corsa 2014	Est. copies ≈ 9.8M–15.9M SteamSpy 5M–10M	Est. revenue $53.8M–$144.6M after Steam's cut $97.8M–$222.5M before Steam's cut	$19.99	175k reviews Very Positive	RacingAutomobile Sim