How many copies did Underworld Idle sell?

32k to 53k copies, based on its 1k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Underworld Idle make?

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

How big is Underworld Idle?

Estimated owners: ≈ 32k–53k; from 1k 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 Underworld Idle out and predicted the genre from its 8 similar games. Every figure here, including Underworld Idle's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 890k–3.2M

best case 3.0M (Cookie Clicker)

The Clicker genre

All 8 of your similar games are hits. A big, proven genre for a game like yours.

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

A typical game

≈ 890k–3.2M copies

≈ $5.8M after Steam's cut

from ~28k reviews

Best case

≈ 2.3M–3.7M copies

Cookie Clicker · ≈ $3.1M–$8.4M after Steam's cut

The genre you'd be entering

Your set: Your set clusters on Clicker (8 of 8) and Idler (7 of 8).
The winners: Winners here lead with Clicker + Idler, priced around $5.
The era: The games you compared span 2015 to 2025, a genre with a long track record.

Copies and revenue are rough lifetime estimates from the review count.

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
IdleOn 2025	Est. copies ≈ 704k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	29k reviews Mostly Positive	IdlerPixel Graphics
Cookie Clicker 2021	Est. copies ≈ 2.3M–3.7M 3.2x vs typical SteamSpy 2M–5M	Est. revenue $3.1M–$8.4M after Steam's cut $5.7M–$13.0M before the cut	$4.99	92k reviews Overwhelmingly Positive	ClickerIdler
AdVenture Capitalist 2015	Est. copies ≈ 2.8M–4.5M 2.1x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	60k reviews Very Positive	ClickerIdler
Mr.Mine 2020	Est. copies ≈ 489k–795k SteamSpy 500k–1M	Est. revenue Free	Free	19k reviews Very Positive	IdlerClicker
Cell to Singularity - Evolution Never Ends 2021	Est. copies ≈ 682k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	28k reviews Very Positive	ClickerFree to Play
Leaf Blower Revolution - Idle Game 2020	Est. copies ≈ 696k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	26k reviews Very Positive	IdlerClicker
Clicker Heroes 2015	Est. copies ≈ 2.9M–4.7M 2.2x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	62k reviews Very Positive	ClickerIdler
Sakura Clicker 2015	Est. copies ≈ 665k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	14k reviews Very Positive	NudityFree to Play