How many copies did Islet Online sell?

16k to 25k copies, based on its 539 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Islet Online make?

Islet Online is free to play, so there is no copy-sales revenue to estimate.

How big is Islet Online?

Estimated owners: ≈ 16k–25k; from 539 reviews (Mostly 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 Islet Online out and predicted the genre from its 8 similar games. Every figure here, including Islet Online's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 713k–2.2M

best case 15.7M (Palworld)

Games like Islet Online

The middle of these games

≈ 713k–2.2M copies

≈ $6.1M–$32.4M after Steam's cut

from ~34k 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: Palworld at ≈ 12.0M–19.4M copies, ≈ $98.7M–$265.3M 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 34k reviews in their first month; the spread ran 7k to 470k.

The genre you'd be entering

Your set: Your set clusters on Sandbox (6 of 8) and Building (4 of 8).
The winners: Winners here lead with Open World + Survival, priced around $30. The breakout hits carry Creature Collector + Online Co-Op + Co-op; a typical game here doesn't.
The era: The games you compared span 2018 to 2026, and 3 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 38 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
Craftopia 2020	Est. copies ≈ 501k–814k SteamSpy 1M–2M	Est. revenue $3.4M–$9.3M after Steam's cut $6.3M–$14.2M before the cut	$24.99	20k reviews Mostly Positive	Open WorldCrafting
Palworld 2026	Est. copies ≈ 12.0M–19.4M 14x vs typical SteamSpy 50M–100M	Est. revenue $98.7M–$265.3M after Steam's cut $179.4M–$408.2M before the cut	$29.99	482k reviews Very Positive	Open WorldSurvival
Amazing Cultivation Simulator 2020	Est. copies ≈ 585k–951k SteamSpy 500k–1M	Est. revenue $4.0M–$10.8M after Steam's cut $7.3M–$16.6M before the cut	$24.99	24k reviews Very Positive	SimulationMartial Arts
Planet Zoo 2019	Est. copies ≈ 2.8M–4.6M 2.9x vs typical SteamSpy 2M–5M	Est. revenue $34.7M–$93.4M after Steam's cut $63.2M–$143.7M before the cut	$44.99	97k reviews Very Positive	Management Simulation
Jurassic World Evolution 2018	Est. copies ≈ 1.7M–2.7M 1.6x vs typical SteamSpy 2M–5M	Est. revenue $20.8M–$55.9M after Steam's cut $37.8M–$86.0M before the cut	$44.99	55k reviews Very Positive	BuildingDinosaurs
DRAGON QUEST BUILDERS™ 2 2019	Est. copies ≈ 232k–377k SteamSpy 500k–1M	Est. revenue $3.2M–$8.6M after Steam's cut $5.8M–$13.2M before the cut	$49.99	8k reviews Very Positive	RPGOpen World Survival Craft
The Scroll of Taiwu : Beyond The Dome 2026	Est. copies ≈ 1.7M–2.8M 2.1x vs typical SteamSpy 2M–5M	Est. revenue $14.3M–$38.6M after Steam's cut $26.1M–$59.3M before the cut	$29.99	70k reviews Mixed	RPGMartial Arts
Fields of Mistria 2026	Est. copies ≈ 834k–1.4M SteamSpy 500k–1M	Est. revenue $3.2M–$8.6M after Steam's cut $5.8M–$13.3M before the cut	$13.99	34k reviews Overwhelmingly Positive	Early AccessFarming Sim