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How many copies did Sealand Survivor sell?

Estimated copies sold
≈ 25–40
$14–$36 after Steam's cut $25–$56 before Steam's cut
from 1 review (1 user reviews)
Only 1 review so far, so that range swings on one or two people. Read it as a hint, not a measurement.

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 Sealand Survivor and predicted how it would do from its 7 similar games. Every figure here, including Sealand Survivor's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 8.1M–19.4M
best case 38.8M (Portal 2)
Games like Sealand Survivor

A typical game among these

≈ 8.1M–19.4M copies

≈ $80.5M–$114.3M after Steam's cut

from ~166k reviews

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

4 of the 7 similar games are hits.

No genre covers most of these similar games. The closest is Action-Adventure (3 of 7), 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: Portal 2 at ≈ 29.5M–48.0M copies, ≈ $81.1M–$218.1M after Steam's cut.

The genre you'd be entering
These games
The similar games share Action-Adventure (3 of 7) and Puzzle (3 of 7).
The winners
Winners here lead with Platformer + Puzzle, priced around $10.
When they shipped
The similar games span 2009 to 2024, and 2 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 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

Portal 2
2011
Est. copies
≈ 29.5M–48.0M
2.8x vs typical
SteamSpy 5M–10M
Est. revenue
$81.1M–$218.1M after Steam's cut $147.5M–$335.6M before Steam's cut
$9.99
467k reviews
Overwhelmingly Positive
Savage Age
2024
Est. copies
≈ 546–887
too small to compare
SteamSpy under 20k
Est. revenue
$2k–$6k after Steam's cut $4k–$9k before Steam's cut
$14.99
22 reviews
Positive
War Solution - Casual Math Game
2019
Est. copies
≈ 1k–2k
too small to compare
SteamSpy under 20k
Est. revenue
$995–$3k after Steam's cut $2k–$4k before Steam's cut
$2.99
42 reviews
Mostly Positive
EducationCasual
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
Timemelters
2024
Est. copies
≈ 5k–8k
too small to compare
SteamSpy under 20k
Est. revenue
$26k–$71k after Steam's cut $48k–$109k before Steam's cut
$19.99
194 reviews
Very Positive
StrategyFantasy
Rise of the Tomb Raider™
2016
Est. copies
≈ 6.5M–10.6M
SteamSpy 2M–5M
Est. revenue
$53.7M–$144.2M after Steam's cut $97.5M–$221.9M before Steam's cut
$29.99
156k reviews
Very Positive
AdventureAction
STAR WARS Jedi: Fallen Order™
2019
Est. copies
≈ 5.1M–8.2M
SteamSpy 2M–5M
Est. revenue
$55.6M–$149.5M after Steam's cut $101.1M–$230.0M before Steam's cut
$39.99
176k reviews
Very Positive
Action-AdventureSouls-like

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