How much revenue did Iron Sea Defenders make?

$58k–$157k after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Iron Sea Defenders sell?

Q: How many copies did Iron Sea Defenders sell?

14k to 23k copies, based on its 340 Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 14k–23k; $58k–$157k after Steam's cut $106k–$241k before the cut; from 340 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 Iron Sea Defenders out and predicted the genre from its 8 similar games. Every figure here, including Iron Sea Defenders's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 738k–1.4M

best case 13.0M (7 Days to Die)

Games like Iron Sea Defenders

The middle of these games

≈ 738k–1.4M copies

≈ $3.4M–$8.7M after Steam's cut

from ~21k 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: 7 Days to Die at ≈ 9.9M–16.1M copies, ≈ $122.7M–$330.0M after Steam's cut. A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on Base-Building (5 of 8) and Building (4 of 8).
The winners: Winners here lead with Survival + Zombies, priced around $45. The breakout hits carry Zombies + Multiplayer + Open World; a typical game here doesn't.
The era: The games you compared span 2013 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
Mountain 2014	Est. copies ≈ 912k–1.5M SteamSpy 500k–1M	Est. revenue $248k–$668k after Steam's cut $452k–$1.0M before the cut	$0.99	16k reviews Very Positive	SimulationIndie
Kingdoms and Castles 2017	Est. copies ≈ 1.1M–1.8M SteamSpy 1M–2M	Est. revenue $5.9M–$16.0M after Steam's cut $10.8M–$24.6M before the cut	$19.99	31k reviews Very Positive	City Builder Colony Sim
The Riftbreaker 2021	Est. copies ≈ 611k–993k SteamSpy 1M–2M	Est. revenue $5.0M–$13.6M after Steam's cut $9.2M–$20.9M before the cut	$29.99	25k reviews Very Positive	Base-BuildingTower Defense
Kingdom: Classic 2015	Est. copies ≈ 1.1M–1.8M SteamSpy 2M–5M	Est. revenue Free	Free	23k reviews Very Positive	Free to PlayStrategy
Kingdom: New Lands 2016	Est. copies ≈ 514k–834k SteamSpy 1M–2M	Est. revenue $2.1M–$5.7M after Steam's cut $3.8M–$8.8M before the cut	$14.99	12k reviews Very Positive	Tower Defense Survival
Stronghold Crusader HD (2012) 2013	Est. copies ≈ 1.3M–2.2M SteamSpy 1M–2M	Est. revenue $3.7M–$9.8M after Steam's cut $6.6M–$15.1M before the cut	$9.99	21k reviews Overwhelmingly Positive	MilitaryCity Builder
Bad North: Jotunn Edition 2018	Est. copies ≈ 431k–700k SteamSpy 500k–1M	Est. revenue $1.8M–$4.8M after Steam's cut $3.2M–$7.3M before the cut	$14.99	14k reviews Very Positive	WargameVikings
7 Days to Die 2024	Est. copies ≈ 9.9M–16.1M 19x vs typical SteamSpy 10M–20M	Est. revenue $122.7M–$330.0M after Steam's cut $223.1M–$507.7M before the cut	$44.99	400k reviews Very Positive	SurvivalZombies