How many copies did Star Sonata 2 sell?

7k to 12k copies, based on its 293 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Star Sonata 2 make?

Star Sonata 2 is free to play, so there is no copy-sales revenue to estimate.

How big is Star Sonata 2?

Estimated owners: ≈ 7k–12k; from 293 reviews (Mixed)

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 Star Sonata 2 out and predicted the genre from its 8 similar games. Every figure here, including Star Sonata 2's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 16k–4.9M

best case 22.6M (No Man's Sky)

Games like Star Sonata 2

The middle of these games

≈ 16k–4.9M copies

≈ $431k–$262.8M after Steam's cut

from ~2k reviews

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

4 of your 8 similar games are hits.

Best case: No Man's Sky at ≈ 17.2M–28.0M copies, ≈ $284.5M–$764.9M after Steam's cut.

What it took to get here

About half the games that made it here had over 281 reviews in their first month; the spread ran 10 to 145k.

The genre you'd be entering

Your set: Your set clusters on Open World (6 of 8) and Sandbox (5 of 8).
The winners: Winners here lead with Open World + Open World Survival Craft, priced around $60.
The era: The games you compared span 2010 to 2022, 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 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
EVE Online 2010	Est. copies ≈ 2.5M–4.0M 24x vs typical SteamSpy 2M–5M	Est. revenue Free	Free	39k reviews Mostly Positive	SpaceFree to Play
No Man's Sky 2016	Est. copies ≈ 17.2M–28.0M 248x vs typical SteamSpy 5M–10M	Est. revenue $284.5M–$764.9M after Steam's cut $517.2M–$1176.7M before the cut	$59.99	415k reviews Very Positive	Open WorldOpen World Survival Craft
Dual Universe 2022	Est. copies ≈ 14k–23k SteamSpy 100k–200k	Est. revenue Free	Free	565 reviews Mixed	Massively MultiplayerMMORPG
Astro Lords 2015	Est. copies ≈ 11k–18k SteamSpy 100k–200k	Est. revenue Free	Free	230 reviews Mixed	SpaceMassively Multiplayer
CSC \| Space MMO 2020	Est. copies ≈ 12k–20k SteamSpy 50k–100k	Est. revenue Free	Free	485 reviews Mixed	Massively MultiplayerSpace
Rise - The Vieneo Province 2020	Est. copies ≈ 719–1k SteamSpy under 20k	Est. revenue $4k–$11k after Steam's cut $7k–$16k before the cut	$19.99	29 reviews Mostly Positive	FlightExploration
Boundless 2018	Est. copies ≈ 84k–137k 1.7x vs typical SteamSpy 100k–200k	Est. revenue $464k–$1.2M after Steam's cut $843k–$1.9M before the cut	$19.99	3k reviews Mixed	Open World Survival CraftSandbox
New World: Aeternum 2021	Est. copies ≈ 7.4M–12.0M 178x vs typical SteamSpy 50M–100M	Est. revenue Free	Free	297k reviews Mixed	Open WorldMassively Multiplayer