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) 20.4M–37.7M

best case 124.1M (PUBG: BATTLEGROUNDS)

Games like Swallow the Sea

The middle of these games

≈ 20.4M–37.7M copies

≈ $85.0M–$95.0M after Steam's cut

from ~638k 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.

No genre covers most of your similar games. The closest is Co-op (4 of 8), so the genre you lead with is still undecided.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: PUBG: BATTLEGROUNDS at ≈ 94.5M–153.6M copies. 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, and none of them 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 70 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
Destiny 2 2019	Est. copies ≈ 19.0M–30.9M SteamSpy 20M–50M	Est. revenue Free	Free	661k reviews Mostly Positive	Free to PlayOpen World
Bloons TD 6 2018	Est. copies ≈ 12.0M–19.5M SteamSpy 2M–5M	Est. revenue $46.1M–$124.0M after Steam's cut $83.8M–$190.7M before the cut	$13.99	394k reviews Overwhelmingly Positive	Tower DefenseStrategy
Raft 2022	Est. copies ≈ 9.4M–15.2M SteamSpy 10M–20M	Est. revenue $51.5M–$138.4M after Steam's cut $93.6M–$213.0M before the cut	$19.99	378k reviews Very Positive	SurvivalMultiplayer
Wallpaper Engine 2018	Est. copies ≈ 30.8M–50.0M 1.6x vs typical SteamSpy 20M–50M	Est. revenue $42.2M–$113.5M after Steam's cut $76.8M–$174.6M before the cut	$4.99	1.0M reviews Overwhelmingly Positive	MatureUtilities
ARK: Survival Evolved 2017	Est. copies ≈ 26.7M–43.4M 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
Unturned 2017	Est. copies ≈ 19.4M–31.6M SteamSpy 50M–100M	Est. revenue Free	Free	565k reviews Very Positive	Free to PlaySurvival
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.5M–153.6M 4.3x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
Geometry Dash 2014	Est. copies ≈ 35.7M–58.0M SteamSpy 5M–10M	Est. revenue $49.0M–$131.7M after Steam's cut $89.1M–$202.7M before the cut	$4.99	638k reviews Very Positive	DifficultMusic