How many copies did Hammerfight sell?

107k to 174k 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 owners: ≈ 107k–174k; from 2k reviews (Mostly 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 Hammerfight out and predicted the genre from its 8 similar games. Every figure here, including Hammerfight's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 5.5M–13.0M

best case 85.4M (Garry's Mod)

The Sandbox genre

All 8 of your similar games are hits. A big, proven genre for a game like yours.

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

A typical game

≈ 5.5M–13.0M copies

≈ $38.7M–$91.1M after Steam's cut

from ~199k reviews

Best case

≈ 65.1M–105.7M copies

Garry's Mod · ≈ $178.7M–$480.5M after Steam's cut

The genre you'd be entering

Your set: Your set clusters on Sandbox (5 of 8) and Physics (4 of 8).
The winners: Winners here lead with Sandbox + Moddable, priced around $10.
The era: The games you compared span 2006 to 2021, a genre with a long track record.

Copies and revenue are rough lifetime estimates from the review count.

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 $10.7M–$24.4M before the cut	$4.99	125k reviews Very Positive	MultiplayerFunny
Garry's Mod 2006	Est. copies ≈ 65.1M–105.7M 6.3x vs typical SteamSpy 20M–50M	Est. revenue $178.7M–$480.5M after Steam's cut $324.9M–$739.2M before the cut	$9.99	1.3M reviews Overwhelmingly Positive	SandboxModdable
Fall Guys 2020	Est. copies ≈ 12.4M–20.1M 2.4x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	469k reviews Very Positive	MultiplayerParty Game
People Playground 2019	Est. copies ≈ 9.1M–14.8M 1.6x vs typical SteamSpy 5M–10M	Est. revenue $24.9M–$67.1M after Steam's cut $45.4M–$103.2M before the cut	$9.99	315k reviews Overwhelmingly Positive	SandboxGore
Human Fall Flat 2016	Est. copies ≈ 9.0M–14.7M SteamSpy 10M–20M	Est. revenue $49.6M–$133.4M after Steam's cut $90.2M–$205.2M before the cut	$19.99	226k reviews Very Positive	Co-opFunny
Space Engineers 2019	Est. copies ≈ 3.9M–6.3M SteamSpy 2M–5M	Est. revenue $21.2M–$57.1M after Steam's cut $38.6M–$87.8M before the cut	$19.99	134k reviews Very Positive	SpaceSandbox
Totally Accurate Battle Simulator 2021	Est. copies ≈ 3.8M–6.1M SteamSpy 2M–5M	Est. revenue $20.7M–$55.7M after Steam's cut $37.7M–$85.7M before the cut	$19.99	152k reviews Overwhelmingly Positive	SandboxSimulation
Assetto Corsa 2014	Est. copies ≈ 9.0M–14.6M SteamSpy 5M–10M	Est. revenue $49.2M–$132.3M after Steam's cut $89.5M–$203.6M before the cut	$19.99	172k reviews Very Positive	RacingAutomobile Sim