How many copies did Idle Slayer sell?

268k to 435k copies, based on its 11k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Idle Slayer make?

Idle Slayer is free to play, so there is no copy-sales revenue to estimate.

How big is Idle Slayer?

Estimated owners: ≈ 268k–435k; from 11k 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 Idle Slayer out and predicted the genre from its 8 similar games. Every figure here, including Idle Slayer's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 596k–902k

best case 4.0M (Clicker Heroes)

Games like Idle Slayer

The middle of these games

≈ 596k–902k copies

≈ $458k after Steam's cut

from ~18k 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.

Your picks lean toward this genre's biggest survivors; the typical figure reads from its ordinary successes.

Best case: Clicker Heroes at ≈ 3.0M–4.9M copies. A breakout hit, far above a typical game.

What it took to get here

About half the games that made it here had over 3k reviews in their first month; the spread ran 1k to 26k.

The genre you'd be entering

Your set: Your set clusters on Idler (7 of 8) and Clicker (6 of 8).
The winners: Winners here lead with Clicker + Idler. The breakout hits carry Free to Play + Clicker; a typical game here doesn't.
The era: The games you compared span 2014 to 2025, 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 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

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Cell to Singularity - Evolution Never Ends 2021	Est. copies ≈ 693k–1.1M 1.6x vs typical SteamSpy 1M–2M	Est. revenue Free	Free	28k reviews Very Positive	ClickerFree to Play
Leaf Blower Revolution - Idle Game 2020	Est. copies ≈ 656k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	26k reviews Very Positive	IdlerClicker
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
Clicker Heroes 2015	Est. copies ≈ 3.0M–4.9M 3.5x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	62k reviews Very Positive	ClickerIdler
Mr.Mine 2020	Est. copies ≈ 462k–751k SteamSpy 500k–1M	Est. revenue Free	Free	19k reviews Very Positive	IdlerClicker
IdleOn - The Incremental MMO 2025	Est. copies ≈ 736k–1.2M 1.7x vs typical SteamSpy 1M–2M	Est. revenue Free	Free	30k reviews Mostly Positive	IdlerPixel Graphics
Shop Titans 2020	Est. copies ≈ 446k–724k SteamSpy 1M–2M	Est. revenue Free	Free	18k reviews Mostly Positive	IdlerShop Keeper
AdVenture Capitalist 2015	Est. copies ≈ 2.9M–4.8M 3.4x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	60k reviews Very Positive	ClickerIdler