How many copies did The Monster Inside sell?

72k to 117k copies, based on its 2k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did The Monster Inside make?

The Monster Inside is free to play, so there is no copy-sales revenue to estimate.

How big is The Monster Inside?

Estimated owners: ≈ 72k–117k; from 2k 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 The Monster Inside out and predicted the genre from its 8 similar games. Every figure here, including The Monster Inside's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.9M–5.0M

best case 10.1M (Doki Doki Literature Club!)

The Anime 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

≈ 1.9M–5.0M copies

≈ $8.2M–$62.2M after Steam's cut

from ~82k reviews

Best case

≈ 7.7M–12.5M copies

Doki Doki Literature Club!

The genre you'd be entering

Your set: Your set clusters on Anime (5 of 8) and Story Rich (5 of 8).
The winners: Winners here lead with Psychological Horror + Visual Novel.
The era: The games you compared span 2014 to 2024, 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
Doki Doki Literature Club! 2017	Est. copies ≈ 7.7M–12.5M 2.7x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	224k reviews Overwhelmingly Positive	Psychological Horror Visual Novel
Everlasting Summer 2014	Est. copies ≈ 4.0M–6.6M SteamSpy 500k–1M	Est. revenue Free	Free	78k reviews Very Positive	Visual Novel Story Rich
Disco Elysium - The Final Cut 2019	Est. copies ≈ 3.7M–6.0M 1.6x vs typical SteamSpy 2M–5M	Est. revenue $40.8M–$109.8M after Steam's cut $74.2M–$168.9M before the cut	$39.99	129k reviews Very Positive	RPGStory Rich
NEEDY STREAMER OVERLOAD 2022	Est. copies ≈ 1.4M–2.2M SteamSpy 1M–2M	Est. revenue $6.0M–$16.1M after Steam's cut $10.9M–$24.8M before the cut	$15.99	57k reviews Very Positive	Psychological HorrorAnime
Persona 5 Royal 2022	Est. copies ≈ 3.2M–5.3M 1.6x vs typical SteamSpy 2M–5M	Est. revenue $53.4M–$143.6M after Steam's cut $97.1M–$221.0M before the cut	$59.99	135k reviews Overwhelmingly Positive	JRPG Story Rich
Persona 4 Golden 2020	Est. copies ≈ 2.3M–3.7M SteamSpy 1M–2M	Est. revenue $12.5M–$33.6M after Steam's cut $22.7M–$51.7M before the cut	$19.99	86k reviews Overwhelmingly Positive	JRPGGreat Soundtrack
The Hungry Lamb: Traveling in the Late Ming Dynasty 2024	Est. copies ≈ 1.4M–2.3M SteamSpy 1M–2M	Est. revenue $3.9M–$10.6M after Steam's cut $7.1M–$16.3M before the cut	$9.99	60k reviews Very Positive	Visual NovelHistorical
Love Is All Around 2023	Est. copies ≈ 1.1M–1.8M SteamSpy 1M–2M	Est. revenue $3.0M–$8.1M after Steam's cut $5.5M–$12.5M before the cut	$9.99	46k reviews Very Positive	Dating SimSexual Content