How many copies did Space Slaughter sell?

198 to 322 copies, based on its 8 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Space Slaughter make?

Space Slaughter is free to play, so there is no copy-sales revenue to estimate.

How big is Space Slaughter?

Estimated owners: ≈ 198–322; from 8 reviews (8 user reviews); Thin evidence: 8 reviews. That range swings on one or two people, so read it as a hint, not a measurement.

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

Copies, estimated from reviews

typical (middle half) 667–1k

best case 13k (Cozy Space Survivors)

Games like Space Slaughter

The middle of these games

≈ 667–1k copies

≈ $1k–$2k after Steam's cut

from ~24 reviews

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

None of your 8 similar games are hits.

Best case: Cozy Space Survivors at ≈ 10k–16k copies, ≈ $8k–$22k after Steam's cut. A breakout hit, far above a typical game.

What it took to get here

About half the games that made it here had over 15 reviews in their first month; the spread ran 3 to 148.

Under about 100 in month one, almost nothing recovers.

The genre you'd be entering

Your set: Your set clusters on Bullet Hell (8 of 8) and Arcade (7 of 8).
The winners: Winners here lead with Action Roguelike + Exploration, priced around $3. The breakout hits carry Action Roguelike + Top-Down Shooter + Rogue-lite; a typical game here doesn't.
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
Ardein.Fall 2021	Est. copies ≈ 595–967 SteamSpy under 20k	Est. revenue $817–$2k after Steam's cut $1k–$3k before the cut	$4.99	24 reviews Positive	ActionIndie
Debris Infinity 2017	Est. copies ≈ 654–1k SteamSpy under 20k	Est. revenue $898–$2k after Steam's cut $2k–$4k before the cut	$4.99	19 reviews Positive	ArcadeCasual
Cozy Space Survivors 2024	Est. copies ≈ 10k–16k 17x vs typical SteamSpy 20k–50k	Est. revenue $8k–$22k after Steam's cut $15k–$34k before the cut	$2.99	409 reviews Very Positive	Action RoguelikeExploration
Meteorites 3D 2022	Est. copies ≈ 422–685 SteamSpy 50k–100k	Est. revenue $579–$2k after Steam's cut $1k–$2k before the cut	$4.99	17 reviews Positive	Arena ShooterBullet Hell
GalaxIverse 2016	Est. copies ≈ 3k–4k 2.5x vs typical SteamSpy 50k–100k	Est. revenue $691–$2k after Steam's cut $1k–$3k before the cut	$0.99	61 reviews Mostly Positive	ShooterIndie
Deep Space Shooter 2018	Est. copies ≈ 1k–2k SteamSpy 100k–200k	Est. revenue $1k–$4k after Steam's cut $3k–$6k before the cut	$4.99	34 reviews Mixed	ActionIndie
Planet Surfer 2023	Est. copies ≈ 422–685 SteamSpy under 20k	Est. revenue $695–$2k after Steam's cut $1k–$3k before the cut	$5.99	17 reviews Positive	Exploration3D Platformer
Putin Destroys Alien 2023	Est. copies ≈ 1k–2k 1.9x vs typical SteamSpy under 20k	Est. revenue $2k–$4k after Steam's cut $3k–$6k before the cut	$4.90	45 reviews Positive	MemesFlight