How much revenue did Sins of a Solar Empire II make?

$3.0M–$8.1M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Sins of a Solar Empire II sell?

Q: How many copies did Sins of a Solar Empire II sell?

218k to 354k copies, based on its 9k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 218k–354k; $3.0M–$8.1M after Steam's cut $5.4M–$12.4M before Steam's cut; from 9k 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 Sins of a Solar Empire II and predicted how it would do from its 8 similar games. Every figure here, including Sins of a Solar Empire II's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 976k–1.5M

best case 10.7M (Stellaris)

Games like Sins of a Solar Empire II

A typical game among these

≈ 976k–1.5M copies

≈ $11.4M–$24.8M after Steam's cut

from ~23k reviews

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

All 8 of the similar games are hits.

Best case: Stellaris at ≈ 8.2M–13.3M copies, ≈ $112.6M–$302.6M after Steam's cut. It is a breakout hit, far above a typical game.

The genre you'd be entering

These games: The similar games share Space (7 of 8) and Sci-fi (5 of 8).
The winners: Winners here lead with Space + Grand Strategy, priced around $50. The breakout hits carry Exploration + Grand Strategy + 4X; a typical game here doesn't.
When they shipped: The similar games span 2010 to 2024, and 1 of the 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

Game	Est. copies	Est. revenue	Price	Reviews	Tags
X4: Foundations 2018	Est. copies ≈ 920k–1.5M SteamSpy 1M–2M	Est. revenue $12.7M–$34.0M after Steam's cut $23.0M–$52.3M before Steam's cut	$49.99	30k reviews Mostly Positive	Space SimSimulation
Empires of the Undergrowth 2024	Est. copies ≈ 470k–764k SteamSpy 500k–1M	Est. revenue $3.9M–$10.4M after Steam's cut $7.1M–$16.0M before Steam's cut	$29.99	19k reviews Very Positive	StrategySimulation
Sins of a Solar Empire®: Rebellion 2012	Est. copies ≈ 1.0M–1.7M SteamSpy 2M–5M	Est. revenue $5.7M–$15.3M after Steam's cut $10.3M–$23.5M before Steam's cut	$19.99	16k reviews Very Positive	ManagementDiplomacy
Stellaris 2016	Est. copies ≈ 8.2M–13.3M 8.5x vs typical SteamSpy 2M–5M	Est. revenue $112.6M–$302.6M after Steam's cut $204.7M–$465.6M before Steam's cut	$49.99	197k reviews Very Positive	SpaceGrand Strategy
ENDLESS Space™ 2 2017	Est. copies ≈ 795k–1.3M SteamSpy 1M–2M	Est. revenue $8.7M–$23.5M after Steam's cut $15.9M–$36.2M before Steam's cut	$39.99	23k reviews Very Positive	StrategySpace
Sid Meier's Civilization®: Beyond Earth™ 2014	Est. copies ≈ 1.3M–2.1M SteamSpy 1M–2M	Est. revenue $14.3M–$38.4M after Steam's cut $26.0M–$59.0M before Steam's cut	$39.99	23k reviews Mixed	StrategyTurn-Based Strategy
STAR WARS™ Empire at War - Gold Pack 2010	Est. copies ≈ 2.7M–4.4M 1.9x vs typical SteamSpy 1M–2M	Est. revenue $15.0M–$40.4M after Steam's cut $27.3M–$62.2M before Steam's cut	$19.99	43k reviews Overwhelmingly Positive	StrategyRTS
Homeworld Remastered Collection 2015	Est. copies ≈ 693k–1.1M SteamSpy 1M–2M	Est. revenue $6.7M–$17.9M after Steam's cut $12.1M–$27.6M before Steam's cut	$34.99	14k reviews Very Positive	SpaceStrategy