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How many copies did Sanctum sell?

Estimated copies sold
≈ 212k–345k
$583k–$1.6M after Steam's cut $1.1M–$2.4M 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 Sanctum out and predicted the genre from its 8 similar games. Every figure here, including Sanctum's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 4.6M–45.9M
best case 87.7M (Left 4 Dead 2)
Games like Sanctum

The middle of these games

≈ 4.6M–45.9M copies

≈ $26.5M–$307.9M after Steam's cut

from ~314k reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

6 of your 8 similar games are hits.

Best case: Left 4 Dead 2 at ≈ 66.8M–108.6M copies, ≈ $183.6M–$493.6M after Steam's cut.

The genre you'd be entering
Your set
Your set clusters on Co-op (8 of 8) and FPS (7 of 8).
The winners
Winners here lead with Zombies + Co-op, priced around $10.
The era
The games you compared span 2009 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

Call of Duty®: Black Ops III
2015
Est. copies
≈ 11.4M–18.5M
SteamSpy 5M–10M
Est. revenue
$187.8M–$504.9M after Steam's cut $341.4M–$776.7M before the cut
$59.99
233k reviews
Very Positive
MultiplayerZombies
Sanctum 2
2013
Est. copies
≈ 910k–1.5M
SteamSpy 2M–5M
Est. revenue
$3.7M–$10.1M after Steam's cut $6.8M–$15.5M before the cut
$14.99
14k reviews
Very Positive
Left 4 Dead 2
2009
Est. copies
≈ 66.8M–108.6M
3.4x vs typical
SteamSpy 50M–100M
Est. revenue
$183.6M–$493.6M after Steam's cut $333.8M–$759.4M before the cut
$9.99
1.1M reviews
Overwhelmingly Positive
ZombiesCo-op
PAYDAY 2
2013
Est. copies
≈ 42.6M–69.3M
2.1x vs typical
SteamSpy 20M–50M
Est. revenue
$117.1M–$314.8M after Steam's cut $212.9M–$484.4M before the cut
$9.99
674k reviews
Very Positive
Co-opAction
Bloons TD 6
2018
Est. copies
≈ 12.0M–19.5M
SteamSpy 2M–5M
Est. revenue
$46.2M–$124.2M after Steam's cut $84.0M–$191.0M before the cut
$13.99
395k reviews
Overwhelmingly Positive
Tower DefenseStrategy
Outpost: Infinity Siege
2024
Est. copies
≈ 338k–549k
SteamSpy 200k–500k
Est. revenue
$2.3M–$6.2M after Steam's cut $4.2M–$9.6M before the cut
$24.99
14k reviews
Mixed
Robots3D
Out of Ammo
2016
Est. copies
≈ 31k–50k
too small to compare
SteamSpy 50k–100k
Est. revenue
$84k–$226k after Steam's cut $153k–$347k before the cut
$9.99
735 reviews
Very Positive
Beach Invasion 1945 - Pacific
2023
Est. copies
≈ 7k–11k
too small to compare
SteamSpy under 20k
Est. revenue
$19k–$50k after Steam's cut $34k–$77k before the cut
$9.99
273 reviews
Mostly Positive
ShooterWorld War II

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