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How many copies did Guardians Frontline sell?

Estimated copies sold
≈ 9k–14k
$60k–$160k after Steam's cut $108k–$247k before Steam's cut
from 350 reviews (Very 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 Guardians Frontline and predicted how it would do from its 8 similar games. Every figure here, including Guardians Frontline's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 1.5M–2.4M
best case 23.0M (No Man's Sky)
Games like Guardians Frontline

A typical game among these

≈ 1.5M–2.4M copies

≈ $9.5M–$21.5M after Steam's cut

from ~47k 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.

No genre covers most of these similar games. The closest is Horror (4 of 8), so its genre is hard to place.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: No Man's Sky at ≈ 17.5M–28.5M copies, ≈ $289.3M–$777.8M after Steam's cut. It is a breakout hit, far above a typical game.

The genre you'd be entering
These games
The similar games share Horror (4 of 8) and First-Person (3 of 8).
The winners
Winners here lead with VR + FPS, priced around $60. The breakout hits carry Open World + Open World Survival Craft + Exploration; a typical game here doesn't.
When they shipped
The similar games span 2014 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 70 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

SUPERHOT
2016
Est. copies
≈ 1.7M–2.8M
SteamSpy 1M–2M
Est. revenue
$11.7M–$31.4M after Steam's cut $21.2M–$48.2M before Steam's cut
$24.99
41k reviews
Very Positive
ActionFPS
Half-Life: Alyx
2020
Est. copies
≈ 2.6M–4.3M
2.3x vs typical
SteamSpy 2M–5M
Est. revenue
$43.2M–$116.1M after Steam's cut $78.5M–$178.5M before Steam's cut
$59.99
106k reviews
Overwhelmingly Positive
VRFPS
Inside the Backrooms
2022
Est. copies
≈ 1.2M–1.9M
SteamSpy 1M–2M
Est. revenue
$2.2M–$6.0M after Steam's cut $4.1M–$9.2M before Steam's cut
$6.99
47k reviews
Mostly Positive
HorrorMultiplayer
Alien: Isolation
2014
Est. copies
≈ 3.8M–6.1M
SteamSpy 2M–5M
Est. revenue
$41.3M–$110.9M after Steam's cut $75.0M–$170.6M before Steam's cut
$39.99
67k reviews
Very Positive
No Man's Sky
2016
Est. copies
≈ 17.5M–28.5M
9.0x vs typical
SteamSpy 5M–10M
Est. revenue
$289.3M–$777.8M after Steam's cut $526.0M–$1196.6M before Steam's cut
$59.99
422k reviews
Very Positive
Open WorldOpen World Survival Craft
UNO
2017
Est. copies
≈ 1.9M–3.0M
SteamSpy 2M–5M
Est. revenue
$5.1M–$13.8M after Steam's cut $9.3M–$21.2M before Steam's cut
$9.99
54k reviews
Mostly Positive
Card GameMultiplayer
BONEWORKS
2019
Est. copies
≈ 1.1M–1.7M
SteamSpy 1M–2M
Est. revenue
$8.7M–$23.3M after Steam's cut $15.8M–$35.8M before Steam's cut
$29.99
36k reviews
Very Positive
VRPhysics
Subnautica
2018
Est. copies
≈ 11.6M–18.8M
8.1x vs typical
SteamSpy 5M–10M
Est. revenue
$95.5M–$256.7M after Steam's cut $173.6M–$395.0M before Steam's cut
$29.99
381k reviews
Overwhelmingly Positive
Open World Survival CraftSurvival

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