How many copies did FPS Chess sell?

1.1M to 1.8M copies, based on its 44k 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 players who have it: ≈ 1.1M–1.8M; from 44k reviews (Very 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 FPS Chess and predicted how it would do from its 8 similar games. Every figure here, including FPS Chess's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 40.2M–91.1M

best case 820.1M (Counter-Strike 2)

Games like FPS Chess

A typical game among these

≈ 40.2M–91.1M copies

≈ $520.6M–$750.6M after Steam's cut

from ~1.2M 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: Counter-Strike 2 at ≈ 624.8M–1015.3M copies. It is a breakout hit, far above a typical game.

The genre you'd be entering

These games: The similar games share FPS (5 of 8) and Shooter (4 of 8).
The winners: Winners here lead with Shooter + FPS. The breakout hits carry Action + Shooter + FPS; a typical game here doesn't.
When they shipped: The similar games span 2006 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
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 95.8M–155.7M 2.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.8M reviews Mixed	SurvivalShooter
Tom Clancy's Rainbow Six Siege 2015	Est. copies ≈ 76.0M–123.4M SteamSpy 20M–50M	Est. revenue Free	Free	1.6M reviews Very Positive	FPSPvP
Counter-Strike 2 2012	Est. copies ≈ 624.8M–1015.3M 8.5x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	9.9M reviews Very Positive	FPSShooter
Apex Legends™ 2020	Est. copies ≈ 26.6M–43.2M SteamSpy 100M–200M	Est. revenue Free	Free	1.1M reviews Mixed	Free to PlayBattle Royale
Destiny 2 2019	Est. copies ≈ 19.1M–31.0M SteamSpy 20M–50M	Est. revenue Free	Free	663k reviews Mostly Positive	Free to PlayOpen World
Garry's Mod 2006	Est. copies ≈ 80.0M–130.1M 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
Rust 2018	Est. copies ≈ 42.7M–69.3M SteamSpy 20M–50M	Est. revenue $469.3M–$1261.8M after Steam's cut $853.3M–$1941.3M before Steam's cut	$39.99	1.4M reviews Very Positive	SurvivalCrafting
War Thunder 2013	Est. copies ≈ 49.7M–80.7M SteamSpy 20M–50M	Est. revenue Free	Free	786k reviews Mostly Positive	Free to PlaySimulation