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How many copies did Skybolt Zack sell?

Estimated copies sold
≈ 3k–5k
$12k–$31k after Steam's cut $21k–$48k before Steam's cut
from 105 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 Skybolt Zack and predicted how it would do from its 8 similar games. Every figure here, including Skybolt Zack's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 11k–54k
best case 517k (Mark of the Ninja)
Games like Skybolt Zack

A typical game among these

≈ 11k–54k copies

≈ $8k–$158k after Steam's cut

from ~469 reviews

Only the top fifth of 2019's Steam releases earned $34k or more before Steam's cut, so plan for that or less.

3 of the 8 similar games are hits.

Best case: Mark of the Ninja at ≈ 394k–640k copies.

What their first month looked like
About half the games that made it here had over 448 reviews in their first month; the range was 25 to 2k.
The genre you'd be entering
These games
The similar games share Platformer (8 of 8) and Side Scroller (8 of 8).
The winners
Winners here lead with Stealth + Platformer.
When they shipped
The similar games span 2015 to 2025, and 1 of the 7 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

Mark of the Ninja
unreleased
Est. copies
≈ 394k–640k
34x vs typical
SteamSpy 1M–2M
Est. revenue
Free
Free
16k reviews
Overwhelmingly Positive
Nitro Express
2025
Est. copies
≈ 28k–46k
2.4x vs typical
SteamSpy 20k–50k
Est. revenue
$100k–$270k after Steam's cut $182k–$415k before Steam's cut
$12.99
1k reviews
Mostly Positive
Side Scroller2D Platformer
Dragon Mine
2022
Est. copies
≈ 744–1k
SteamSpy under 20k
Est. revenue
$612–$2k after Steam's cut $1k–$3k before Steam's cut
$2.99
30 reviews
Positive
Precision PlatformerSide Scroller
JumpJet Rex
2015
Est. copies
≈ 26k–42k
SteamSpy under 20k
Est. revenue
$71k–$192k after Steam's cut $130k–$296k before Steam's cut
$9.99
533 reviews
Very Positive
Side Scroller2D Platformer
The Deletion
2015
Est. copies
≈ 11k–18k
SteamSpy 50k–100k
Est. revenue
$6k–$16k after Steam's cut $11k–$25k before Steam's cut
$1.99
228 reviews
Mostly Positive
Precision PlatformerSide Scroller
Nary
2016
Est. copies
≈ 4k–6k
SteamSpy 50k–100k
Est. revenue
$2k–$6k after Steam's cut $4k–$9k before Steam's cut
$1.99
93 reviews
Very Positive
Side ScrollerAction Roguelike
BIT.TRIP RERUNNER
2023
Est. copies
≈ 10k–16k
SteamSpy under 20k
Est. revenue
$55k–$148k after Steam's cut $100k–$228k before Steam's cut
$19.99
404 reviews
Very Positive
Soda Crisis
2022
Est. copies
≈ 80k–130k
6.9x vs typical
SteamSpy 200k–500k
Est. revenue
$242k–$650k after Steam's cut $440k–$1.0M before Steam's cut
$10.99
3k reviews
Very Positive
Side ScrollerRunner

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