How many copies did Islet Online sell?

15k to 25k copies, based on its 538 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 players who have it: ≈ 15k–25k; from 538 reviews (Mostly Positive)

Copies are estimated from the public review count, adjusted for release year, and cross-checked against SteamSpy's own estimate.

Did the prediction match what actually happened?

We hid Islet Online and predicted how it would do from its 8 similar games. Every figure here, including Islet Online's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 714k–2.2M

best case 16.0M (Palworld)

Games like Islet Online

A typical game among these

≈ 714k–2.2M copies

≈ $6.3M–$32.4M after Steam's cut

from ~36k reviews

Only the top fifth of 2019's Steam releases earned $34k or more before Steam's cut, so plan for that or less.

All 8 of the similar games are hits.

Best case: Palworld at ≈ 12.2M–19.8M copies, ≈ $100.5M–$270.1M after Steam's cut. It is a breakout hit, far above a typical game.

What their first month looked like

About half the games that made it here had over 34k reviews in their first month; the range was 7k to 469k.

The genre you'd be entering

These games: The similar games share 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.
When they shipped: The similar games span 2018 to 2026, and 3 of the 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 ≈ 502k–816k SteamSpy 1M–2M	Est. revenue $3.5M–$9.3M after Steam's cut $6.3M–$14.3M before Steam's cut	$24.99	20k reviews Mostly Positive	Open WorldCrafting
Palworld 2026	Est. copies ≈ 12.2M–19.8M 14x vs typical SteamSpy 50M–100M	Est. revenue $100.5M–$270.1M after Steam's cut $182.7M–$415.6M before Steam's cut	$29.99	491k reviews Very Positive	Open WorldSurvival
Amazing Cultivation Simulator 2020	Est. copies ≈ 586k–952k SteamSpy 500k–1M	Est. revenue $4.0M–$10.8M after Steam's cut $7.3M–$16.7M before Steam's cut	$24.99	24k reviews Very Positive	SimulationMartial Arts
Planet Zoo 2019	Est. copies ≈ 2.8M–4.6M 2.7x vs typical SteamSpy 2M–5M	Est. revenue $34.9M–$93.8M after Steam's cut $63.4M–$144.3M before Steam's cut	$44.99	98k reviews Very Positive	Management Simulation
Jurassic World Evolution 2018	Est. copies ≈ 1.7M–2.7M 1.5x vs typical SteamSpy 2M–5M	Est. revenue $20.8M–$55.9M after Steam's cut $37.8M–$86.1M before Steam's cut	$44.99	55k reviews Very Positive	BuildingDinosaurs
DRAGON QUEST BUILDERS™ 2 2019	Est. copies ≈ 233k–379k SteamSpy 500k–1M	Est. revenue $3.2M–$8.6M after Steam's cut $5.8M–$13.3M before Steam's 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 2.0x vs typical SteamSpy 2M–5M	Est. revenue $14.4M–$38.7M after Steam's cut $26.1M–$59.5M before Steam's cut	$29.99	70k reviews Mixed	RPGMartial Arts
Fields of Mistria 2026	Est. copies ≈ 886k–1.4M SteamSpy 500k–1M	Est. revenue $3.4M–$9.2M after Steam's cut $6.2M–$14.1M before Steam's cut	$13.99	36k reviews Overwhelmingly Positive	Early AccessFarming Sim