How many copies did Operation: Harsh Doorstop sell?

492k to 800k copies, based on its 21k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Operation: Harsh Doorstop make?

Operation: Harsh Doorstop is free to play, so there is no copy-sales revenue to estimate.

How big is Operation: Harsh Doorstop?

Estimated owners: ≈ 492k–800k; from 21k 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 Operation: Harsh Doorstop out and predicted the genre from its 8 similar games. Every figure here, including Operation: Harsh Doorstop's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 3.0M–4.1M

best case 52.4M (War Thunder)

The FPS genre

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

Your picks lean toward this genre's biggest survivors; the typical figure reads from its ordinary successes.

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

A typical game

≈ 3.0M–4.1M copies

≈ $29.5M–$38.8M after Steam's cut

from ~81k reviews

Best case

≈ 40.0M–64.9M copies

War Thunder

A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on FPS (6 of 8) and Shooter (6 of 8).
The winners: Winners here lead with Tanks + Shooter, priced around $40. The breakout hits carry Tactical; a typical game here doesn't.
The era: The games you compared span 2013 to 2020, 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
Warface: Clutch 2014	Est. copies ≈ 4.2M–6.9M SteamSpy 20M–50M	Est. revenue Free	Free	81k reviews Mixed	Free to PlayFPS
World of Tanks Blitz 2016	Est. copies ≈ 6.1M–9.9M 1.9x vs typical SteamSpy 10M–20M	Est. revenue Free	Free	153k reviews Mostly Positive	TanksFree to Play
Black Squad 2019	Est. copies ≈ 2.3M–3.8M SteamSpy 10M–20M	Est. revenue Free	Free	81k reviews Mostly Positive	Free to PlayFPS
Ravenfield 2017	Est. copies ≈ 2.7M–4.4M SteamSpy 1M–2M	Est. revenue $13.5M–$36.4M after Steam's cut $24.6M–$55.9M before the cut	$17.99	79k reviews Overwhelmingly Positive	FPSWar
Squad 2020	Est. copies ≈ 6.3M–10.3M 3.0x vs typical SteamSpy 2M–5M	Est. revenue $69.8M–$187.6M after Steam's cut $126.9M–$288.6M before the cut	$39.99	240k reviews Very Positive	MilitaryRealistic
World of Warships 2017	Est. copies ≈ 5.4M–8.7M 1.9x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	156k reviews Mostly Positive	Free to PlayNaval Combat
War Thunder 2013	Est. copies ≈ 40.0M–64.9M 9.5x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	768k reviews Mostly Positive	Free to PlaySimulation
Battlefield 4™ 2020	Est. copies ≈ 2.1M–3.5M SteamSpy 1M–2M	Est. revenue $23.5M–$63.2M after Steam's cut $42.7M–$97.2M before the cut	$39.99	81k reviews Very Positive	MultiplayerFPS