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How many copies did Sky Force Reloaded sell?

Estimated copies sold
≈ 95k–154k
$261k–$702k after Steam's cut $474k–$1.1M 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 Sky Force Reloaded out and predicted the genre from its 8 similar games. Every figure here, including Sky Force Reloaded's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 3.3M–9.0M
best case 21.7M (Undertale)
Games like Sky Force Reloaded

The middle of these games

≈ 3.3M–9.0M copies

≈ $10.0M–$64.8M after Steam's cut

from ~104k 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: Undertale at ≈ 16.5M–26.8M copies, ≈ $45.3M–$121.9M after Steam's cut.

What it took to get here
About half the games that made it here had over 41k reviews in their first month; the spread ran 16k to 129k.
The genre you'd be entering
Your set
Your set clusters on Action Roguelike (6 of 8) and Bullet Hell (6 of 8).
The winners
Winners here lead with Story Rich + Choices Matter, priced around $10.
The era
The games you compared span 2012 to 2025, and 1 of your 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

Vampire Survivors
2022
Est. copies
≈ 6.6M–10.7M
2.5x vs typical
SteamSpy 5M–10M
Est. revenue
$9.0M–$24.2M after Steam's cut $16.4M–$37.3M before the cut
$4.99
265k reviews
Overwhelmingly Positive
Action RoguelikeBullet Hell
Realm of the Mad God Exalt
2012
Est. copies
≈ 3.0M–4.9M
SteamSpy 500k–1M
Est. revenue
Free
Free
48k reviews
Very Positive
Pixel GraphicsMMORPG
HoloCure - Save the Fans!
2023
Est. copies
≈ 1.0M–1.6M
SteamSpy 1M–2M
Est. revenue
Free
Free
41k reviews
Overwhelmingly Positive
Pixel GraphicsBullet Hell
Deep Rock Galactic: Survivor
2025
Est. copies
≈ 1.2M–1.9M
SteamSpy 1M–2M
Est. revenue
$4.3M–$11.5M after Steam's cut $7.7M–$17.6M before the cut
$12.99
48k reviews
Very Positive
DwarfAction Roguelike
Enter the Gungeon
2016
Est. copies
≈ 3.7M–6.1M
SteamSpy 2M–5M
Est. revenue
$15.4M–$41.4M after Steam's cut $28.0M–$63.6M before the cut
$14.99
90k reviews
Overwhelmingly Positive
Bullet HellAction Roguelike
Cuphead
2017
Est. copies
≈ 7.6M–12.3M
2.1x vs typical
SteamSpy 5M–10M
Est. revenue
$41.7M–$112.1M after Steam's cut $75.8M–$172.5M before the cut
$19.99
220k reviews
Overwhelmingly Positive
DifficultCartoon
Undertale
2015
Est. copies
≈ 16.5M–26.8M
3.3x vs typical
SteamSpy 5M–10M
Est. revenue
$45.3M–$121.9M after Steam's cut $82.4M–$187.6M before the cut
$9.99
338k reviews
Overwhelmingly Positive
Great SoundtrackStory Rich
Brotato
2023
Est. copies
≈ 2.9M–4.8M
SteamSpy 2M–5M
Est. revenue
$4.0M–$10.8M after Steam's cut $7.3M–$16.6M before the cut
$4.99
118k reviews
Overwhelmingly Positive
Rogue-likeSingleplayer

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