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How many copies did Mars Horizon sell?

Estimated copies sold
≈ 77k–125k
$422k–$1.1M after Steam's cut $766k–$1.7M before the cut
from 3k 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 Mars Horizon out and predicted the genre from its 8 similar games. Every figure here, including Mars Horizon's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 798–2.4M
best case 10.8M (Stellaris)
Games like Mars Horizon

The middle of these games

≈ 798–2.4M copies

≈ $9k–$72.6M after Steam's cut

from ~374 reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

2 of your 8 similar games are hits.

Best case: Stellaris at ≈ 8.2M–13.3M copies, ≈ $112.6M–$302.8M after Steam's cut.

What it took to get here
About half the games that made it here had over 12 reviews in their first month; the spread ran 3 to 686.
Under about 100 in month one, almost nothing recovers.
The genre you'd be entering
Your set
Your set clusters on Simulation (6 of 8) and Sandbox (5 of 8).
The winners
Winners here lead with Space + Grand Strategy, priced around $50.
The era
The games you compared span 2015 to 2023, 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

Stellaris
2016
Est. copies
≈ 8.2M–13.3M
526x vs typical
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
Kerbal Space Program
2015
Est. copies
≈ 7.1M–11.6M
392x 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
Satellite Command
2016
Est. copies
≈ 3k–5k
SteamSpy 20k–50k
Est. revenue
$9k–$25k after Steam's cut $17k–$38k before the cut
$9.99
81 reviews
Mixed
SimulationIndie
Rover Mechanic Simulator
2020
Est. copies
≈ 17k–27k
1.8x vs typical
SteamSpy 50k–100k
Est. revenue
$55k–$147k after Steam's cut $99k–$226k before the cut
$11.99
667 reviews
Mostly Positive
SimulationIndie
Rocket Inc
2022
Est. copies
≈ 99–161
SteamSpy 20k–50k
Est. revenue
$81–$219 after Steam's cut $148–$337 before the cut
$2.99
4 reviews
4 user reviews
Exploration2D Platformer
Rover Mechanic Challenge - ERC Competition
2020
Est. copies
≈ 422–685
SteamSpy under 20k
Est. revenue
Free
Free
17 reviews
Mostly Positive
Delivery in Space
2022
Est. copies
≈ 670–1k
SteamSpy 20k–50k
Est. revenue
$367–$985 after Steam's cut $667–$2k before the cut
$1.99
27 reviews
Positive
Card GameStrategy
EarthX
2023
Est. copies
≈ 23k–37k
2.5x vs typical
SteamSpy 20k–50k
Est. revenue
$125k–$336k after Steam's cut $227k–$517k before the cut
$19.99
917 reviews
Very Positive
SimulationIndie

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