How many copies did Alien Swarm: Reactive Drop sell?

818k to 1.3M copies, based on its 24k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Alien Swarm: Reactive Drop make?

Alien Swarm: Reactive Drop is free to play, so there is no copy-sales revenue to estimate.

How big is Alien Swarm: Reactive Drop?

Estimated owners: ≈ 818k–1.3M; from 24k 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 Alien Swarm: Reactive Drop out and predicted the genre from its 8 similar games. Every figure here, including Alien Swarm: Reactive Drop's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 60k–124k

best case 809k (The Ascent)

Games like Alien Swarm: Reactive Drop

The middle of these games

≈ 60k–124k copies

≈ $222k–$522k 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.

All 8 of your similar games are hits.

Best case: The Ascent at ≈ 617k–1.0M copies, ≈ $5.1M–$13.7M 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 743 reviews in their first month; the spread ran 575 to 9k.

The genre you'd be entering

Your set: Your set clusters on Rogue-lite (5 of 8) and Shooter (5 of 8).
The winners: Winners here lead with Top-Down Shooter + Cyberpunk, priced around $30. The breakout hits carry Cyberpunk + RPG + Co-op; a typical game here doesn't.
The era: The games you compared span 2006 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 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
Skillshot City 2017	Est. copies ≈ 117k–191k 1.8x vs typical SteamSpy under 20k	Est. revenue Free	Free	3k reviews Very Positive	Battle RoyaleRogue-lite
The Ascent 2021	Est. copies ≈ 617k–1.0M 13x vs typical SteamSpy 1M–2M	Est. revenue $5.1M–$13.7M after Steam's cut $9.2M–$21.0M before the cut	$29.99	25k reviews Mostly Positive	Top-Down ShooterCyberpunk
Shadowgrounds 2006	Est. copies ≈ 103k–167k SteamSpy 200k–500k	Est. revenue $197k–$530k after Steam's cut $358k–$816k before the cut	$6.99	2k reviews Very Positive	Top-Down ShooterSci-fi
Hell is Others 2022	Est. copies ≈ 29k–47k SteamSpy 500k–1M	Est. revenue $119k–$319k after Steam's cut $216k–$491k before the cut	$14.99	1k reviews Mostly Positive	Rogue-likeTop-Down
SYNTHETIK 2 2021	Est. copies ≈ 86k–140k 1.8x vs typical SteamSpy 500k–1M	Est. revenue $474k–$1.3M after Steam's cut $862k–$2.0M before the cut	$19.99	3k reviews Very Positive	Early AccessRogue-lite
Touhou Endless Dream 2021	Est. copies ≈ 47k–76k SteamSpy under 20k	Est. revenue $103k–$276k after Steam's cut $186k–$424k before the cut	$7.99	2k reviews Very Positive	CasualAnime
Blazing Beaks 2019	Est. copies ≈ 76k–123k SteamSpy under 20k	Est. revenue $312k–$838k after Steam's cut $567k–$1.3M before the cut	$14.99	3k reviews Very Positive	Pixel GraphicsAction Roguelike
NIMRODS 2024	Est. copies ≈ 45k–74k SteamSpy 200k–500k	Est. revenue $125k–$336k after Steam's cut $227k–$517k before the cut	$9.99	2k reviews Very Positive	Early Access2D