How many copies did Stacks:Space! sell?

3k to 4k copies, based on its 111 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Stacks:Space! make?

Stacks:Space! is free to play, so there is no copy-sales revenue to estimate.

How big is Stacks:Space!?

Estimated players who have it: ≈ 3k–4k; from 111 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 Stacks:Space! and predicted how it would do from its 8 similar games. Every figure here, including Stacks:Space!'s, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 9.1M–23.0M

best case 35.2M (ARK: Survival Evolved)

Games like Stacks:Space!

A typical game among these

≈ 9.1M–23.0M copies

≈ $140.7M–$203.6M after Steam's cut

from ~381k reviews

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

5 of the 8 similar games are hits.

Best case: ARK: Survival Evolved at ≈ 26.8M–43.5M copies, ≈ $110.4M–$296.8M after Steam's cut.

What their first month looked like

About half the games that made it here had over 18 reviews in their first month; the range was 1 to 184k.

Games with under about 100 reviews in month one almost never recover.

The genre you'd be entering

These games: The similar games share Open World (5 of 8) and Survival (5 of 8).
The winners: Winners here lead with Open World Survival Craft + Survival, priced around $15.
When they shipped: The similar games span 2016 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 52 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
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 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
CryptoZoo 2023	Est. copies ≈ 99–161 too small to compare SteamSpy under 20k	Est. revenue $27–$73 after Steam's cut $49–$112 before Steam's cut	$0.99	4 reviews 4 user reviews	CasualAction
Subnautica 2018	Est. copies ≈ 11.6M–18.8M SteamSpy 5M–10M	Est. revenue $95.5M–$256.7M after Steam's cut $173.6M–$395.0M before Steam's cut	$29.99	381k reviews Overwhelmingly Positive	Open World Survival CraftSurvival
ARK: Survival Evolved 2017	Est. copies ≈ 26.8M–43.5M 2.0x vs typical SteamSpy 20M–50M	Est. revenue $110.4M–$296.8M after Steam's cut $200.7M–$456.6M before Steam's cut	$14.99	779k reviews Very Positive	Open World Survival CraftSurvival
Satisfactory 2024	Est. copies ≈ 6.9M–11.3M SteamSpy 10M–20M	Est. revenue $76.3M–$205.2M after Steam's cut $138.8M–$315.7M before Steam's cut	$39.99	280k reviews Overwhelmingly Positive	Base-BuildingAutomation
Castaway Station 2023	Est. copies ≈ 422–685 too small to compare SteamSpy under 20k	Est. revenue $579–$2k after Steam's cut $1k–$2k before Steam's cut	$4.99	17 reviews Positive	Card BattlerRogue-lite
Heat Death 2022	Est. copies ≈ 2k–3k too small to compare SteamSpy under 20k	Est. revenue $7k–$20k after Steam's cut $13k–$30k before Steam's cut	$14.99	71 reviews Very Positive	Roguelike DeckbuilderCard Battler