How much revenue did Kerbal Space Program make?

$73.8M–$198.5M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Kerbal Space Program sell?

Q: How many copies did Kerbal Space Program sell?

6.7M to 10.9M copies, based on its 145k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 6.7M–10.9M; $73.8M–$198.5M after Steam's cut $134.2M–$305.4M before the cut; from 145k reviews (Overwhelmingly 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 Kerbal Space Program out and predicted the genre from its 8 similar games. Every figure here, including Kerbal Space Program's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 5.2M–9.9M

best case 21.6M (No Man's Sky)

The Space 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

≈ 5.2M–9.9M copies

≈ $47.5M–$148.1M after Steam's cut

from ~141k reviews

Best case

≈ 16.5M–26.8M copies

No Man's Sky · ≈ $271.9M–$731.1M after Steam's cut

The genre you'd be entering

Your set: Your set clusters on Space (6 of 8) and Open World (5 of 8).
The winners: Winners here lead with Open World + Open World Survival Craft, priced around $60.
The era: The games you compared span 2015 to 2021, 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
ASTRONEER 2019	Est. copies ≈ 4.0M–6.5M SteamSpy 2M–5M	Est. revenue $32.9M–$88.6M after Steam's cut $59.9M–$136.3M before the cut	$29.99	139k reviews Very Positive	MultiplayerOpen World
Stellaris 2016	Est. copies ≈ 7.8M–12.7M SteamSpy 2M–5M	Est. revenue $107.8M–$290.0M after Steam's cut $196.1M–$446.1M before the cut	$49.99	196k reviews Very Positive	SpaceGrand Strategy
Oxygen Not Included 2019	Est. copies ≈ 4.1M–6.7M SteamSpy 2M–5M	Est. revenue $28.2M–$75.9M after Steam's cut $51.4M–$116.8M before the cut	$24.99	143k reviews Overwhelmingly Positive	Colony SimBase-Building
No Man's Sky 2016	Est. copies ≈ 16.5M–26.8M 2.9x vs typical SteamSpy 5M–10M	Est. revenue $271.9M–$731.1M after Steam's cut $494.4M–$1124.8M before the cut	$59.99	412k reviews Very Positive	Open WorldOpen World Survival Craft
Dyson Sphere Program 2021	Est. copies ≈ 2.3M–3.7M SteamSpy 2M–5M	Est. revenue $12.4M–$33.4M after Steam's cut $22.6M–$51.4M before the cut	$19.99	91k reviews Overwhelmingly Positive	AutomationSpace
Elite Dangerous 2015	Est. copies ≈ 5.0M–8.1M SteamSpy 2M–5M	Est. revenue $27.3M–$73.3M after Steam's cut $49.6M–$112.8M before the cut	$19.99	107k reviews Mostly Positive	Space SimSpace
RimWorld 2018	Est. copies ≈ 7.4M–12.0M 1.7x vs typical SteamSpy 5M–10M	Est. revenue $71.1M–$191.2M after Steam's cut $129.3M–$294.2M before the cut	$34.99	243k reviews Overwhelmingly Positive	Colony SimBase-Building
Space Engineers 2019	Est. copies ≈ 3.9M–6.3M SteamSpy 2M–5M	Est. revenue $21.2M–$57.1M after Steam's cut $38.6M–$87.8M before the cut	$19.99	134k reviews Very Positive	SpaceSandbox