How much revenue did The Backrooms: Mass Extinction make?

The Backrooms: Mass Extinction is free to play, so there is no copy-sales revenue to estimate.

How many copies did The Backrooms: Mass Extinction sell?

Q: How many copies did The Backrooms: Mass Extinction sell?

2k to 3k copies, based on its 70 Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 2k–3k; from 70 reviews (Mixed)

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 The Backrooms: Mass Extinction and predicted how it would do from its 8 similar games. Every figure here, including The Backrooms: Mass Extinction's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 609k–2.7M

best case 5.9M (Trove)

Games like The Backrooms: Mass Extinction

A typical game among these

≈ 609k–2.7M copies

≈ $1.5M–$11.9M after Steam's cut

from ~26k reviews

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

6 of the 8 similar games are hits.

No genre covers most of these similar games. The closest is Dungeon Crawler (4 of 8), so its genre is hard to place.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: Trove at ≈ 4.5M–7.4M copies.

What their first month looked like

About half the games that made it here had over 1k reviews in their first month; the range was 9 to 22k.

The genre you'd be entering

These games: The similar games share Dungeon Crawler (4 of 8) and Open World (4 of 8).
The winners: Winners here lead with Open World + Sandbox.
When they shipped: The similar games span 2011 to 2025, and 3 of the 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 79 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
Noita 2020	Est. copies ≈ 2.2M–3.6M 3.5x vs typical SteamSpy 2M–5M	Est. revenue $12.1M–$32.6M after Steam's cut $22.0M–$50.2M before Steam's cut	$19.99	89k reviews Overwhelmingly Positive	PhysicsRogue-like
shapez 2020	Est. copies ≈ 396k–644k SteamSpy 200k–500k	Est. revenue $1.1M–$2.9M after Steam's cut $2.0M–$4.5M before Steam's cut	$9.99	16k reviews Overwhelmingly Positive	AutomationBase-Building
Trove 2015	Est. copies ≈ 4.5M–7.4M 3.6x vs typical SteamSpy 10M–20M	Est. revenue Free	Free	93k reviews Mostly Positive	Free to PlayOpen World
Spiral Knights 2011	Est. copies ≈ 1.5M–2.5M SteamSpy 2M–5M	Est. revenue Free	Free	24k reviews Very Positive	Free to PlayMassively Multiplayer
Wayfinder 2024	Est. copies ≈ 666k–1.1M SteamSpy 500k–1M	Est. revenue $4.6M–$12.3M after Steam's cut $8.3M–$18.9M before Steam's cut	$24.99	27k reviews Mixed	Action RPGOnline Co-Op
大千世界 2020	Est. copies ≈ 59k–95k SteamSpy 200k–500k	Est. revenue $64k–$173k after Steam's cut $117k–$266k before Steam's cut	$3.99	2k reviews Very Positive	RPGOpen World
ASTRA 2024	Est. copies ≈ 620–1k too small to compare SteamSpy 20k–50k	Est. revenue $510–$1k after Steam's cut $927–$2k before Steam's cut	$2.99	25 reviews Positive	ActionAdventure
A Fishy RPG 2025	Est. copies ≈ 347–564 too small to compare SteamSpy under 20k	Est. revenue $95–$254 after Steam's cut $172–$391 before Steam's cut	$0.99	14 reviews Mixed	Early AccessCRPG