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How many copies did Space Pirates And Zombies 2 sell?

Estimated copies sold
≈ 98k–159k
$537k–$1.4M after Steam's cut $977k–$2.2M before the cut
from 3k reviews (Mostly 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 Space Pirates And Zombies 2 out and predicted the genre from its 8 similar games. Every figure here, including Space Pirates And Zombies 2's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 4.9M–7.6M
best case 38.6M (Portal 2)
Games like Space Pirates And Zombies 2

The middle of these games

≈ 4.9M–7.6M copies

≈ $33.4M–$92.8M after Steam's cut

from ~91k 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 Space (5 of 8) and Open World (4 of 8).
The winners
Winners here lead with Platformer + Puzzle, priced around $10.
The era
The games you compared span 2008 to 2019, 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 36 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
≈ 29.4M–47.8M
5.1x 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
Overwhelmingly Positive
STAR WARS™ Empire at War - Gold Pack
2010
Est. copies
≈ 2.7M–4.4M
SteamSpy 1M–2M
Est. revenue
$15.0M–$40.2M after Steam's cut $27.2M–$61.9M before the cut
$19.99
43k reviews
Overwhelmingly Positive
StrategyRTS
Elite Dangerous
2015
Est. copies
≈ 5.2M–8.5M
SteamSpy 2M–5M
Est. revenue
$28.8M–$77.4M after Steam's cut $52.3M–$119.1M before the cut
$19.99
107k reviews
Mostly Positive
Space SimSpace
STAR WARS™ Battlefront II (Classic, 2005)
2009
Est. copies
≈ 3.4M–5.6M
SteamSpy 2M–5M
Est. revenue
$9.4M–$25.3M after Steam's cut $17.1M–$39.0M before the cut
$9.99
54k reviews
Very Positive
ActionMultiplayer
SPORE™
2008
Est. copies
≈ 4.6M–7.5M
SteamSpy 2M–5M
Est. revenue
$25.2M–$67.8M after Steam's cut $45.8M–$104.3M before the cut
$19.99
73k reviews
Very Positive
God GameOpen World
RimWorld
2018
Est. copies
≈ 7.5M–12.1M
2.7x vs typical
SteamSpy 5M–10M
Est. revenue
$71.8M–$193.1M after Steam's cut $130.6M–$297.1M before the cut
$34.99
246k reviews
Overwhelmingly Positive
Colony SimBase-Building
Space Engineers
2019
Est. copies
≈ 3.9M–6.3M
SteamSpy 2M–5M
Est. revenue
$21.3M–$57.2M after Steam's cut $38.7M–$88.0M before the cut
$19.99
134k reviews
Very Positive
SpaceSandbox
PlanetSide 2
2012
Est. copies
≈ 4.7M–7.7M
SteamSpy 5M–10M
Est. revenue
Free
Free
75k reviews
Very Positive
Free to PlayFPS

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