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How many copies did Rocket Science sell?

Estimated copies sold
≈ 4k–7k
$24k–$65k after Steam's cut $44k–$99k before the cut
from 176 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 Rocket Science out and predicted the genre from its 8 similar games. Every figure here, including Rocket Science's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 5.9M–9.7M
best case 22.6M (No Man's Sky)
Games like Rocket Science

The middle of these games

≈ 5.9M–9.7M copies

≈ $50.9M–$160.7M after Steam's cut

from ~141k 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: No Man's Sky at ≈ 17.2M–28.0M copies, ≈ $284.5M–$764.9M after Steam's cut.

The genre you'd be entering
Your set
Your set clusters on Space (7 of 8) and Exploration (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 2008 to 2019, 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 36 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

Kerbal Space Program
2015
Est. copies
≈ 7.1M–11.6M
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
No Man's Sky
2016
Est. copies
≈ 17.2M–28.0M
2.9x vs typical
SteamSpy 5M–10M
Est. revenue
$284.5M–$764.9M after Steam's cut $517.2M–$1176.7M before the cut
$59.99
415k reviews
Very Positive
Open WorldOpen World Survival Craft
ASTRONEER
2019
Est. copies
≈ 4.0M–6.5M
SteamSpy 2M–5M
Est. revenue
$33.0M–$88.8M after Steam's cut $60.1M–$136.6M before the cut
$29.99
139k reviews
Very Positive
MultiplayerOpen World
SPORE™
2008
Est. copies
≈ 4.6M–7.5M
SteamSpy 2M–5M
Est. revenue
$25.2M–$67.8M after Steam's cut $45.8M–$104.3M before the cut
$19.99
73k reviews
Very Positive
God GameOpen World
Oxygen Not Included
2019
Est. copies
≈ 4.1M–6.7M
SteamSpy 2M–5M
Est. revenue
$28.4M–$76.4M after Steam's cut $51.7M–$117.5M before the cut
$24.99
144k reviews
Overwhelmingly Positive
Colony SimBase-Building
Elite Dangerous
2015
Est. copies
≈ 5.2M–8.5M
SteamSpy 2M–5M
Est. revenue
$28.8M–$77.4M after Steam's cut $52.3M–$119.1M before the cut
$19.99
107k reviews
Mostly Positive
Space SimSpace
Stellaris
2016
Est. copies
≈ 8.2M–13.3M
SteamSpy 2M–5M
Est. revenue
$112.6M–$302.8M after Steam's cut $204.7M–$465.8M before the cut
$49.99
197k reviews
Very Positive
Starbound
2016
Est. copies
≈ 5.1M–8.3M
SteamSpy 2M–5M
Est. revenue
$21.1M–$56.8M after Steam's cut $38.4M–$87.4M before the cut
$14.99
123k reviews
Very Positive
Open World Survival CraftSandbox

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