How many copies did Idle Monster TD sell?

21k to 34k copies, based on its 856 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Idle Monster TD make?

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

How big is Idle Monster TD?

Estimated owners: ≈ 21k–34k; from 856 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 Idle Monster TD out and predicted the genre from its 8 similar games. Every figure here, including Idle Monster TD's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 18k–122k

best case 328k (Time Clickers)

Games like Idle Monster TD

The middle of these games

≈ 18k–122k copies

≈ $39k–$72k after Steam's cut

from ~720 reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

3 of your 8 similar games are hits.

Best case: Time Clickers at ≈ 250k–407k copies.

What it took to get here

About half the games that made it here had over 248 reviews in their first month; the spread ran 139 to 4k.

The genre you'd be entering

Your set: Your set clusters on Tower Defense (6 of 8) and Idler (4 of 8).
The winners: Winners here lead with Clicker + Shooter.
The era: 4 of your 8 similar games shipped in the last two years, so this niche is actively shipping.

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 61 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
Space Cycle 2024	Est. copies ≈ 5k–8k SteamSpy under 20k	Est. revenue $3k–$7k after Steam's cut $5k–$11k before the cut	$1.99	193 reviews Very Positive	Rogue-lite Tower Defense
Samawa Idle 2023	Est. copies ≈ 15k–25k SteamSpy 100k–200k	Est. revenue $21k–$56k after Steam's cut $38k–$87k before the cut	$4.99	617 reviews Mixed	ClickerIdler
The Perfect Tower II 2025	Est. copies ≈ 110k–178k 6.1x vs typical SteamSpy 200k–500k	Est. revenue Free	Free	4k reviews Very Positive	StrategyIdler
Time Clickers 2015	Est. copies ≈ 250k–407k 7.1x vs typical SteamSpy 500k–1M	Est. revenue Free	Free	5k reviews Very Positive	ClickerFree to Play
Doom Sweeper 2024	Est. copies ≈ 20k–33k SteamSpy 50k–100k	Est. revenue $28k–$75k after Steam's cut $51k–$116k before the cut	$4.99	822 reviews Mostly Positive	Action RoguelikeHack and Slash
Legendary Hoplite 2024	Est. copies ≈ 9k–15k SteamSpy 50k–100k	Est. revenue $39k–$105k after Steam's cut $71k–$162k before the cut	$14.99	383 reviews Mixed	Strategy RPGRogue-lite
Grow Defense 2021	Est. copies ≈ 15k–24k SteamSpy 200k–500k	Est. revenue Free	Free	606 reviews Mostly Positive	CasualIdler
Screeps: World 2016	Est. copies ≈ 87k–141k 2.9x vs typical SteamSpy 200k–500k	Est. revenue $478k–$1.3M after Steam's cut $869k–$2.0M before the cut	$19.99	2k reviews Very Positive	ProgrammingStrategy