How many copies did Idle Monster TD sell?

21k to 34k copies, based on its 855 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 players who have it: ≈ 21k–34k; from 855 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 Idle Monster TD and predicted how it would do from its 8 similar games. Every figure here, including Idle Monster TD's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 18k–122k

best case 329k (Time Clickers)

Games like Idle Monster TD

A typical game among these

≈ 18k–122k copies

≈ $39k–$72k after Steam's cut

from ~723 reviews

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

3 of the 8 similar games are hits.

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

What their first month looked like

About half the games that made it here had over 247 reviews in their first month; the range was 139 to 4k.

The genre you'd be entering

These games: The similar games share Tower Defense (6 of 8) and Idler (4 of 8).
The winners: Winners here lead with Clicker + Shooter.
When they shipped: 4 of the 8 similar games shipped in the last two years, so this genre 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 Steam's cut	$1.99	193 reviews Very Positive	Rogue-lite Tower Defense
Samawa Idle 2023	Est. copies ≈ 15k–25k SteamSpy 100k–200k	Est. revenue $21k–$57k after Steam's cut $39k–$88k before Steam's cut	$4.99	623 reviews Mixed	ClickerIdler
The Perfect Tower II 2025	Est. copies ≈ 111k–180k 6.2x 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 Steam's cut	$4.99	823 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 Steam's cut	$14.99	382 reviews Mixed	Strategy RPGRogue-lite
Grow Defense 2021	Est. copies ≈ 15k–24k SteamSpy 200k–500k	Est. revenue Free	Free	607 reviews Mostly Positive	CasualIdler
Screeps: World 2016	Est. copies ≈ 87k–142k 2.9x vs typical SteamSpy 200k–500k	Est. revenue $480k–$1.3M after Steam's cut $872k–$2.0M before Steam's cut	$19.99	2k reviews Very Positive	ProgrammingStrategy