How many copies did OrbiTank sell?

397 to 645 copies, based on its 16 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did OrbiTank make?

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

How big is OrbiTank?

Estimated players who have it: ≈ 397–645; from 16 reviews (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 OrbiTank and predicted how it would do from its 8 similar games. Every figure here, including OrbiTank's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 1.1M–1.5M

best case 9.4M (Kerbal Space Program)

Games like OrbiTank

A typical game among these

≈ 1.1M–1.5M copies

≈ $8.7M–$14.4M after Steam's cut

from ~34k 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: Kerbal Space Program at ≈ 7.2M–11.7M copies, ≈ $79.0M–$212.3M after Steam's cut. It is a breakout hit, far above a typical game.

What their first month looked like

About half the games that made it here had over 15k reviews in their first month; the range was 608 to 20k.

The genre you'd be entering

These games: The similar games share Space (6 of 8) and Sandbox (5 of 8).
The winners: Winners here lead with Space + Simulation, priced around $30. The breakout hits carry Building + Sandbox + Space Sim; a typical game here doesn't.
When they shipped: The similar games span 2015 to 2022, 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 61 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
Universe Sandbox 2015	Est. copies ≈ 1.6M–2.6M SteamSpy 1M–2M	Est. revenue $13.0M–$35.0M after Steam's cut $23.6M–$53.8M before Steam's cut	$29.99	32k reviews Overwhelmingly Positive	SandboxSpace
Kerbal Space Program 2015	Est. copies ≈ 7.2M–11.7M 4.3x vs typical SteamSpy 2M–5M	Est. revenue $79.0M–$212.3M after Steam's cut $143.6M–$326.6M before Steam's cut	$39.99	147k reviews Overwhelmingly Positive	SpaceSimulation
Trailmakers 2019	Est. copies ≈ 1.1M–1.8M SteamSpy 1M–2M	Est. revenue $7.8M–$21.0M after Steam's cut $14.2M–$32.3M before Steam's cut	$24.99	39k reviews Very Positive	SpaceAction
Space Engineers 2019	Est. copies ≈ 3.9M–6.3M 3.9x vs typical SteamSpy 2M–5M	Est. revenue $21.3M–$57.3M after Steam's cut $38.7M–$88.1M before Steam's cut	$19.99	135k reviews Very Positive	SpaceSandbox
Model Builder: Complete Edition 2022	Est. copies ≈ 32k–52k too small to compare SteamSpy 50k–100k	Est. revenue $174k–$469k after Steam's cut $317k–$721k before Steam's cut	$19.99	1k reviews Mostly Positive	Immersive SimSandbox
Hardspace: Shipbreaker 2022	Est. copies ≈ 557k–905k SteamSpy 1M–2M	Est. revenue $5.4M–$14.4M after Steam's cut $9.7M–$22.2M before Steam's cut	$34.99	22k reviews Very Positive	SpaceSci-fi
ShellShock Live 2020	Est. copies ≈ 883k–1.4M SteamSpy 1M–2M	Est. revenue $2.4M–$6.5M after Steam's cut $4.4M–$10.0M before Steam's cut	$9.99	36k reviews Very Positive	TanksMultiplayer
Empyrion - Galactic Survival 2020	Est. copies ≈ 854k–1.4M SteamSpy 1M–2M	Est. revenue $4.7M–$12.6M after Steam's cut $8.5M–$19.4M before Steam's cut	$19.99	34k reviews Mostly Positive	Simulation Co-op