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 owners: ≈ 397–645; from 16 reviews (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 OrbiTank out and predicted the genre from its 8 similar games. Every figure here, including OrbiTank's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.1M–1.6M

best case 9.4M (Kerbal Space Program)

Games like OrbiTank

The middle of these games

≈ 1.1M–1.6M copies

≈ $7.6M–$16.5M after Steam's cut

from ~35k 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.

Best case: Kerbal Space Program at ≈ 7.1M–11.6M copies, ≈ $78.6M–$211.3M after Steam's cut. A breakout hit, far above a typical game.

What it took to get here

About half the games that made it here had over 15k reviews in their first month; the spread ran 609 to 20k.

The genre you'd be entering

Your set: Your set clusters on Space (6 of 8) and Sandbox (5 of 8).
The winners: Winners here lead with Space + Simulation, priced around $30. The breakout hits carry Sandbox + Building + Simulation; a typical game here doesn't.
The era: The games you compared 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–2.5M SteamSpy 1M–2M	Est. revenue $12.9M–$34.7M after Steam's cut $23.5M–$53.4M before the cut	$29.99	32k reviews Overwhelmingly Positive	SandboxSpace
Kerbal Space Program 2015	Est. copies ≈ 7.1M–11.6M 4.2x vs typical SteamSpy 2M–5M	Est. revenue $78.6M–$211.3M after Steam's cut $142.9M–$325.1M before the cut	$39.99	146k reviews Overwhelmingly Positive	SpaceSimulation
Trailmakers 2019	Est. copies ≈ 1.1M–1.8M SteamSpy 1M–2M	Est. revenue $7.7M–$20.6M after Steam's cut $13.9M–$31.6M before the cut	$24.99	39k reviews Very Positive	SpaceAction
Space Engineers 2019	Est. copies ≈ 3.9M–6.3M 3.8x vs typical SteamSpy 2M–5M	Est. revenue $21.3M–$57.2M after Steam's cut $38.7M–$88.0M before the cut	$19.99	134k reviews Very Positive	SpaceSandbox
Model Builder: Complete Edition 2022	Est. copies ≈ 32k–52k too small to compare SteamSpy 50k–100k	Est. revenue $175k–$469k after Steam's cut $317k–$722k before the cut	$19.99	1k reviews Mostly Positive	Immersive SimSandbox
Hardspace: Shipbreaker 2022	Est. copies ≈ 554k–900k too small to compare SteamSpy 1M–2M	Est. revenue $5.3M–$14.3M after Steam's cut $9.7M–$22.0M before the 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 the cut	$9.99	36k reviews Very Positive	TanksMultiplayer
Empyrion - Galactic Survival 2020	Est. copies ≈ 853k–1.4M SteamSpy 1M–2M	Est. revenue $4.7M–$12.6M after Steam's cut $8.5M–$19.4M before the cut	$19.99	34k reviews Mostly Positive	Simulation Co-op