How many copies did FPS Chess sell?

1.0M to 1.7M copies, based on its 43k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did FPS Chess make?

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

How big is FPS Chess?

Estimated owners: ≈ 1.0M–1.7M; from 43k 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 FPS Chess out and predicted the genre from its 8 similar games. Every figure here, including FPS Chess's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 40.6M–77.8M

best case 664.3M (Counter-Strike 2)

The FPS 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

≈ 40.6M–77.8M copies

≈ $460.3M–$721.6M after Steam's cut

from ~1.2M reviews

Best case

≈ 506.1M–822.5M copies

Counter-Strike 2

A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on FPS (5 of 8) and Shooter (4 of 8).
The winners: Winners here lead with Shooter + FPS, priced around $25. The breakout hits carry Action + Shooter + FPS; a typical game here doesn't.
The era: The games you compared span 2006 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
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.0M–152.8M 2.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
Tom Clancy's Rainbow Six Siege 2015	Est. copies ≈ 71.1M–115.5M SteamSpy 20M–50M	Est. revenue Free	Free	1.5M reviews Very Positive	FPSPvP
Counter-Strike 2 2012	Est. copies ≈ 506.1M–822.5M 8.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	9.7M reviews Very Positive	FPSShooter
Apex Legends™ 2020	Est. copies ≈ 27.9M–45.4M SteamSpy 100M–200M	Est. revenue Free	Free	1.1M reviews Mixed	Free to PlayBattle Royale
Destiny 2 2019	Est. copies ≈ 19.0M–30.9M SteamSpy 20M–50M	Est. revenue Free	Free	660k reviews Mostly Positive	Free to PlayOpen World
Garry's Mod 2006	Est. copies ≈ 65.1M–105.7M 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
Rust 2018	Est. copies ≈ 42.0M–68.3M SteamSpy 20M–50M	Est. revenue $462.1M–$1242.5M after Steam's cut $840.2M–$1911.5M before the cut	$39.99	1.4M reviews Very Positive	SurvivalCrafting
War Thunder 2013	Est. copies ≈ 40.0M–64.9M SteamSpy 20M–50M	Est. revenue Free	Free	768k reviews Mostly Positive	Free to PlaySimulation