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How many copies did Slime Story sell?

Estimated copies sold
≈ 174–282
$47–$127 after Steam's cut $86–$195 before the cut
from 7 reviews (7 user reviews)
Thin evidence: 7 reviews. That range swings on one or two people, so read it as a hint, not a measurement.

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 Slime Story out and predicted the genre from its 8 similar games. Every figure here, including Slime Story's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 176k–1.4M
best case 38.6M (Portal 2)
Games like Slime Story

The middle of these games

≈ 176k–1.4M copies

≈ $1.1M–$2.5M after Steam's cut

from ~4k 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: Portal 2 at ≈ 29.4M–47.8M copies, ≈ $80.8M–$217.4M after Steam's cut.

The genre you'd be entering
Your set
Your set clusters on Platformer (8 of 8) and 3D Platformer (6 of 8).
The winners
Winners here lead with Platformer + Puzzle, priced around $10.
The era
The games you compared span 2011 to 2024, 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

Snake Pass
2017
Est. copies
≈ 115k–187k
SteamSpy 500k–1M
Est. revenue
$632k–$1.7M after Steam's cut $1.1M–$2.6M before the cut
$19.99
3k reviews
Mostly Positive
3D PlatformerIndie
Portal 2
2011
Est. copies
≈ 29.4M–47.8M
104x vs typical
SteamSpy 5M–10M
Est. revenue
$80.8M–$217.4M after Steam's cut $147.0M–$334.4M before the cut
$9.99
466k reviews
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SEUM: Speedrunners from Hell
2016
Est. copies
≈ 127k–207k
SteamSpy 200k–500k
Est. revenue
$525k–$1.4M after Steam's cut $954k–$2.2M before the cut
$14.99
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Very Positive
3D PlatformerParkour
Papo & Yo
2013
Est. copies
≈ 182k–295k
SteamSpy 50k–100k
Est. revenue
$749k–$2.0M after Steam's cut $1.4M–$3.1M before the cut
$14.99
3k reviews
Very Positive
3D PlatformerPuzzle-Platformer
Quantum Conundrum
2012
Est. copies
≈ 136k–221k
SteamSpy 200k–500k
Est. revenue
$336k–$903k after Steam's cut $611k–$1.4M before the cut
$8.99
2k reviews
Very Positive
Puzzle-PlatformerPuzzle
Chained Together
2024
Est. copies
≈ 1.6M–2.6M
14x vs typical
SteamSpy 2M–5M
Est. revenue
$2.2M–$5.8M after Steam's cut $3.9M–$8.9M before the cut
$4.99
63k reviews
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Co-opAdventure
Hob
2017
Est. copies
≈ 192k–312k
SteamSpy 200k–500k
Est. revenue
$1.1M–$2.8M after Steam's cut $1.9M–$4.4M before the cut
$19.99
6k reviews
Very Positive
AdventureAction
Refunct
2015
Est. copies
≈ 852k–1.4M
3.9x vs typical
SteamSpy 200k–500k
Est. revenue
$701k–$1.9M after Steam's cut $1.3M–$2.9M before the cut
$2.99
17k reviews
Overwhelmingly Positive
Parkour3D Platformer

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