How many copies did Stacks:Space! sell?

3k to 4k copies, based on its 108 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 owners: ≈ 3k–4k; from 108 reviews (Very 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 Stacks:Space! out and predicted the genre from its 8 similar games. Every figure here, including Stacks:Space!'s, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 9.1M–22.6M

best case 35.1M (ARK: Survival Evolved)

Games like Stacks:Space!

The middle of these games

≈ 9.1M–22.6M copies

≈ $140.2M–$203.1M after Steam's cut

from ~379k reviews

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

5 of your 8 similar games are hits.

Best case: ARK: Survival Evolved at ≈ 26.7M–43.4M copies, ≈ $110.1M–$296.0M after Steam's cut.

What it took to get here

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

Under about 100 in month one, almost nothing recovers.

The genre you'd be entering

Your set: Your set clusters on Open World (5 of 8) and Survival (5 of 8).
The winners: Winners here lead with Open World Survival Craft + Survival, priced around $15.
The era: The games you compared span 2016 to 2024, and 1 of your 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 $33.0M–$88.8M after Steam's cut $60.1M–$136.6M before the cut	$29.99	139k reviews Very Positive	MultiplayerOpen World
No Man's Sky 2016	Est. copies ≈ 17.2M–28.0M 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
CryptoZoo 2023	Est. copies ≈ 99–161 too small to compare SteamSpy under 20k	Est. revenue $27–$73 after Steam's cut $49–$112 before the cut	$0.99	4 reviews 4 user reviews	CasualAction
Subnautica 2018	Est. copies ≈ 11.5M–18.7M SteamSpy 5M–10M	Est. revenue $95.0M–$255.4M after Steam's cut $172.7M–$393.0M before the cut	$29.99	379k reviews Overwhelmingly Positive	Open World Survival CraftSurvival
ARK: Survival Evolved 2017	Est. copies ≈ 26.7M–43.4M 2.0x vs typical SteamSpy 20M–50M	Est. revenue $110.1M–$296.0M after Steam's cut $200.2M–$455.4M before the cut	$14.99	776k reviews Very Positive	Open World Survival CraftSurvival
Satisfactory 2024	Est. copies ≈ 6.9M–11.2M SteamSpy 10M–20M	Est. revenue $76.0M–$204.4M after Steam's cut $138.2M–$314.4M before the cut	$39.99	279k reviews Overwhelmingly Positive	Base-BuildingAutomation
Castaway Station 2023	Est. copies ≈ 397–645 too small to compare SteamSpy under 20k	Est. revenue $545–$1k after Steam's cut $991–$2k before the cut	$4.99	16 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 the cut	$14.99	71 reviews Very Positive	Roguelike DeckbuilderCard Battler