How many copies did Swallow the Sea sell?

61k to 99k copies, based on its 2k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Swallow the Sea make?

Swallow the Sea is free to play, so there is no copy-sales revenue to estimate.

How big is Swallow the Sea?

Estimated owners: ≈ 61k–99k; from 2k reviews (Overwhelmingly 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 Swallow the Sea out and predicted the genre from its 8 similar games. Every figure here, including Swallow the Sea's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 20.3M–37.5M

best case 123.4M (PUBG: BATTLEGROUNDS)

The Co-op genre

All 8 of your similar games are hits. A big, proven genre for a game like yours.

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

A typical game

≈ 20.3M–37.5M copies

≈ $82.5M–$91.4M after Steam's cut

from ~627k reviews

Best case

≈ 94.0M–152.8M copies

PUBG: BATTLEGROUNDS

A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on Co-op (4 of 8) and Open World (4 of 8).
The winners: Winners here lead with Survival + Shooter. The breakout hits carry Shooter + Battle Royale + PvP; a typical game here doesn't.
The era: The games you compared span 2014 to 2022, a genre with a long track record.

Copies and revenue are rough lifetime estimates from the review count.

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
Destiny 2 2019	Est. copies ≈ 19.0M–30.9M SteamSpy 20M–50M	Est. revenue Free	Free	660k reviews Mostly Positive	Free to PlayOpen World
Bloons TD 6 2018	Est. copies ≈ 11.9M–19.3M SteamSpy 2M–5M	Est. revenue $45.7M–$122.9M after Steam's cut $83.1M–$189.2M before the cut	$13.99	391k reviews Overwhelmingly Positive	Tower DefenseStrategy
Raft 2022	Est. copies ≈ 9.0M–14.7M SteamSpy 10M–20M	Est. revenue $49.6M–$133.3M after Steam's cut $90.1M–$205.0M before the cut	$19.99	376k reviews Very Positive	SurvivalMultiplayer
Wallpaper Engine 2018	Est. copies ≈ 30.5M–49.6M 1.6x vs typical SteamSpy 20M–50M	Est. revenue $41.9M–$112.5M after Steam's cut $76.1M–$173.1M before the cut	$4.99	1.0M reviews Overwhelmingly Positive	MatureUtilities
ARK: Survival Evolved 2017	Est. copies ≈ 26.6M–43.2M SteamSpy 20M–50M	Est. revenue $109.6M–$294.7M after Steam's cut $199.3M–$453.4M before the cut	$14.99	773k reviews Very Positive	Open World Survival CraftSurvival
Unturned 2017	Est. copies ≈ 19.4M–31.5M SteamSpy 50M–100M	Est. revenue Free	Free	564k reviews Very Positive	Free to PlaySurvival
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.0M–152.8M 4.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
Geometry Dash 2014	Est. copies ≈ 32.6M–53.0M SteamSpy 5M–10M	Est. revenue $44.7M–$120.3M after Steam's cut $81.3M–$185.0M before the cut	$4.99	627k reviews Very Positive	DifficultMusic