How many copies did Subspace Discovery sell?

4k to 6k copies, based on its 146 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Subspace Discovery make?

Subspace Discovery is free to play, so there is no copy-sales revenue to estimate.

How big is Subspace Discovery?

Estimated players who have it: ≈ 4k–6k; from 146 reviews (Mostly 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 Subspace Discovery and predicted how it would do from its 8 similar games. Every figure here, including Subspace Discovery's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 4.8M–9.8M

best case 23.0M (No Man's Sky)

Games like Subspace Discovery

A typical game among these

≈ 4.8M–9.8M copies

≈ $48.5M–$161.1M after Steam's cut

from ~143k 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: No Man's Sky at ≈ 17.5M–28.5M copies, ≈ $289.3M–$777.8M after Steam's cut.

The genre you'd be entering

These games: The similar games share Space (8 of 8) and Exploration (6 of 8).
The winners: Winners here lead with Open World + Open World Survival Craft, priced around $60.
When they shipped: The similar games span 2015 to 2023, 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 61 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
Stellaris 2016	Est. copies ≈ 8.2M–13.3M 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
ASTRONEER 2019	Est. copies ≈ 4.0M–6.5M SteamSpy 2M–5M	Est. revenue $33.1M–$89.1M after Steam's cut $60.2M–$137.0M before Steam's cut	$29.99	139k reviews Very Positive	MultiplayerOpen World
No Man's Sky 2016	Est. copies ≈ 17.5M–28.5M 2.9x vs typical SteamSpy 5M–10M	Est. revenue $289.3M–$777.8M after Steam's cut $526.0M–$1196.6M before Steam's cut	$59.99	422k reviews Very Positive	Open WorldOpen World Survival Craft
Elite Dangerous 2015	Est. copies ≈ 5.3M–8.5M SteamSpy 2M–5M	Est. revenue $28.9M–$77.8M after Steam's cut $52.6M–$119.6M before Steam's cut	$19.99	108k reviews Mostly Positive	Space SimSpace
Starfield 2023	Est. copies ≈ 4.4M–7.1M SteamSpy 2M–5M	Est. revenue $59.8M–$160.9M after Steam's cut $108.8M–$247.5M before Steam's cut	$49.99	175k reviews Mixed	SpaceSingleplayer
Kerbal Space Program 2015	Est. copies ≈ 7.2M–11.7M SteamSpy 2M–5M	Est. revenue $79.0M–$212.3M after Steam's cut $143.6M–$326.6M before Steam's cut	$39.99	147k reviews Overwhelmingly Positive	SpaceSimulation
Outer Wilds 2020	Est. copies ≈ 2.7M–4.4M SteamSpy 1M–2M	Est. revenue $18.5M–$49.7M after Steam's cut $33.6M–$76.4M before Steam's cut	$24.99	108k reviews Overwhelmingly Positive	ExplorationSpace
Prey 2017	Est. copies ≈ 1.9M–3.1M SteamSpy 1M–2M	Est. revenue $15.5M–$41.8M after Steam's cut $28.2M–$64.2M before Steam's cut	$29.99	55k reviews Very Positive	Sci-fiImmersive Sim