How many copies did Operation: Harsh Doorstop sell?

513k to 833k 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: ≈ 513k–833k; 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–4.2M

best case 64.7M (War Thunder)

Games like Operation: Harsh Doorstop

The middle of these games

≈ 3.0M–4.2M copies

≈ $29.1M–$37.0M after Steam's cut

from ~81k 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.

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

Best case: War Thunder at ≈ 49.3M–80.1M copies. 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, 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
Warface: Clutch 2014	Est. copies ≈ 4.6M–7.4M SteamSpy 20M–50M	Est. revenue Free	Free	81k reviews Mixed	Free to PlayFPS
World of Tanks Blitz 2016	Est. copies ≈ 6.4M–10.4M 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 ≈ 2.8M–4.5M SteamSpy 1M–2M	Est. revenue $13.6M–$36.6M after Steam's cut $24.7M–$56.3M before the cut	$17.99	80k reviews Overwhelmingly Positive	FPSWar
Squad 2020	Est. copies ≈ 6.0M–9.8M 3.0x vs typical SteamSpy 2M–5M	Est. revenue $66.2M–$178.0M after Steam's cut $120.4M–$273.9M before the cut	$39.99	243k 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 ≈ 49.3M–80.1M 9.6x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	780k reviews Mostly Positive	Free to PlaySimulation
Battlefield 4™ 2020	Est. copies ≈ 2.0M–3.3M SteamSpy 1M–2M	Est. revenue $22.2M–$59.8M after Steam's cut $40.4M–$92.0M before the cut	$39.99	82k reviews Very Positive	MultiplayerFPS