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How many copies did Rock 'N' Roll Defense sell?

Estimated copies sold
≈ 165k–269k
$227k–$611k after Steam's cut $413k–$939k before Steam's cut
from 4k 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 Rock 'N' Roll Defense and predicted how it would do from its 8 similar games. Every figure here, including Rock 'N' Roll Defense's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 3.1M–13.7M
best case 47.6M (Geometry Dash)
Games like Rock 'N' Roll Defense

A typical game among these

≈ 3.1M–13.7M copies

≈ $8.7M–$40.1M after Steam's cut

from ~114k 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: Geometry Dash at ≈ 36.2M–58.9M copies, ≈ $49.7M–$133.7M after Steam's cut.

The genre you'd be entering
These games
The similar games share Music (6 of 8) and Rhythm (5 of 8).
The winners
Winners here lead with Music + Level Editor, priced around $5.
When they shipped
The similar games span 2009 to 2020, 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 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

Soundpad
2017
Est. copies
≈ 3.6M–5.9M
SteamSpy 2M–5M
Est. revenue
$4.9M–$13.3M after Steam's cut $9.0M–$20.5M before Steam's cut
$4.99
105k reviews
Overwhelmingly Positive
UtilitiesAudio Production
Muse Dash
2019
Est. copies
≈ 3.5M–5.7M
SteamSpy 2M–5M
Est. revenue
$2.9M–$7.8M after Steam's cut $5.3M–$12.0M before Steam's cut
$2.99
122k reviews
Very Positive
MusicRhythm
Bloons TD 6
2018
Est. copies
≈ 12.0M–19.6M
3.5x vs typical
SteamSpy 2M–5M
Est. revenue
$46.3M–$124.5M after Steam's cut $84.2M–$191.5M before Steam's cut
$13.99
396k reviews
Overwhelmingly Positive
Tower DefenseStrategy
Geometry Dash
2014
Est. copies
≈ 36.2M–58.9M
5.7x vs typical
SteamSpy 5M–10M
Est. revenue
$49.7M–$133.7M after Steam's cut $90.4M–$205.7M before Steam's cut
$4.99
647k reviews
Very Positive
DifficultMusic
A Dance of Fire and Ice
2019
Est. copies
≈ 2.4M–3.9M
SteamSpy 2M–5M
Est. revenue
$4.0M–$10.7M after Steam's cut $7.2M–$16.5M before Steam's cut
$5.99
84k reviews
Very Positive
RhythmMusic
DJMAX RESPECT V
2020
Est. copies
≈ 867k–1.4M
SteamSpy 1M–2M
Est. revenue
$11.9M–$32.1M after Steam's cut $21.7M–$49.3M before Steam's cut
$49.99
35k reviews
Very Positive
RhythmMusic
Plants vs. Zombies GOTY Edition
2009
Est. copies
≈ 9.9M–16.1M
SteamSpy 2M–5M
Est. revenue
$13.6M–$36.5M after Steam's cut $24.7M–$56.1M before Steam's cut
$4.99
156k reviews
Overwhelmingly Positive
Tower DefenseZombies
Beat Saber
2019
Est. copies
≈ 2.2M–3.6M
SteamSpy 2M–5M
Est. revenue
$12.1M–$32.5M after Steam's cut $22.0M–$50.0M before Steam's cut
$19.99
76k reviews
Overwhelmingly Positive
VRRhythm

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