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How many copies did Halo: Spartan Strike sell?

Estimated copies sold
≈ 84k–136k
$69k–$185k after Steam's cut $125k–$284k before Steam's cut
from 2k reviews (Mostly 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 Halo: Spartan Strike and predicted how it would do from its 8 similar games. Every figure here, including Halo: Spartan Strike's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 123k–320k
best case 1.1M (Alien Swarm: Reactive Drop)
Games like Halo: Spartan Strike

A typical game among these

≈ 123k–320k copies

≈ $660k–$1.3M after Steam's cut

from ~4k 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: Alien Swarm: Reactive Drop at ≈ 819k–1.3M copies. 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 2k reviews in their first month; the range was 1k to 6k.
The genre you'd be entering
These games
The similar games share Sci-fi (5 of 8) and Aliens (3 of 8).
The winners
Winners here lead with Aliens, priced around $40. The breakout hits carry Aliens + PvE + Class-Based; a typical game here doesn't.
When they shipped
The similar games span 2009 to 2024, and 1 of the 8 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 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

Alien Swarm: Reactive Drop
2017
Est. copies
≈ 819k–1.3M
5.4x vs typical
SteamSpy 200k–500k
Est. revenue
Free
Free
24k reviews
Very Positive
Alien Shooter
2009
Est. copies
≈ 302k–490k
SteamSpy 500k–1M
Est. revenue
$414k–$1.1M after Steam's cut $752k–$1.7M before Steam's cut
$4.99
5k reviews
Overwhelmingly Positive
ShooterAction
Red Solstice 2: Survivors
2021
Est. copies
≈ 82k–134k
SteamSpy 200k–500k
Est. revenue
$339k–$912k after Steam's cut $617k–$1.4M before Steam's cut
$14.99
3k reviews
Mixed
Strategy RPGZombies
Star Valor
2022
Est. copies
≈ 87k–142k
SteamSpy 100k–200k
Est. revenue
$600k–$1.6M after Steam's cut $1.1M–$2.5M before Steam's cut
$24.99
4k reviews
Very Positive
SpaceSandbox
Aliens: Dark Descent
2023
Est. copies
≈ 469k–763k
4.3x vs typical
SteamSpy 500k–1M
Est. revenue
$5.2M–$13.9M after Steam's cut $9.4M–$21.4M before Steam's cut
$39.99
19k reviews
Very Positive
StrategyAction
Starcom: Unknown Space
2024
Est. copies
≈ 112k–181k
SteamSpy 100k–200k
Est. revenue
$767k–$2.1M after Steam's cut $1.4M–$3.2M before Steam's cut
$24.99
5k reviews
Very Positive
SpaceExploration
Halo: Spartan Assault
2014
Est. copies
≈ 277k–449k
SteamSpy 200k–500k
Est. revenue
$227k–$611k after Steam's cut $413k–$941k before Steam's cut
$2.99
5k reviews
Mostly Positive
ActionTop-Down Shooter
X-Morph: Defense
2017
Est. copies
≈ 146k–237k
SteamSpy 200k–500k
Est. revenue
$803k–$2.2M after Steam's cut $1.5M–$3.3M before Steam's cut
$19.99
4k reviews
Very Positive
Tower DefenseStrategy

Sizing up your own game? See how many copies games in its genre usually sell before you build it.