How much revenue did Underground Keeper make?

$3k–$9k after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Underground Keeper sell?

Q: How many copies did Underground Keeper sell?

2k to 4k copies, based on its 56 Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 2k–4k; $3k–$9k after Steam's cut $6k–$13k before Steam's cut; from 56 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 Underground Keeper and predicted how it would do from its 8 similar games. Every figure here, including Underground Keeper's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 30k–267k

best case 580k (Shadows of Doubt)

Games like Underground Keeper

A typical game among these

≈ 30k–267k copies

≈ $69k–$2.2M after Steam's cut

from ~2k reviews

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

5 of the 8 similar games are hits.

Best case: Shadows of Doubt at ≈ 442k–719k copies, ≈ $3.0M–$8.2M after Steam's cut.

What their first month looked like

About half the games that made it here had over 478 reviews in their first month; the range was 134 to 13k.

The genre you'd be entering

These games: The similar games share Horror (6 of 8) and Stealth (5 of 8).
The winners: Winners here lead with Detective + Immersive Sim, priced around $25.
When they shipped: The similar games span 2013 to 2024, and 2 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
Labyrinthine 2023	Est. copies ≈ 434k–706k 9.7x vs typical SteamSpy 1M–2M	Est. revenue $1.2M–$3.2M after Steam's cut $2.2M–$4.9M before Steam's cut	$9.99	18k reviews Very Positive	HorrorOnline Co-Op
Shadows of Doubt 2024	Est. copies ≈ 442k–719k 9.9x vs typical SteamSpy 500k–1M	Est. revenue $3.0M–$8.2M after Steam's cut $5.5M–$12.6M before Steam's cut	$24.99	18k reviews Very Positive	DetectiveImmersive Sim
Hello Neighbor Pre-Alpha 2019	Est. copies ≈ 75k–121k SteamSpy 200k–500k	Est. revenue Free	Free	3k reviews Very Positive	Horror Stealth
Exit From 2021	Est. copies ≈ 14k–22k SteamSpy 50k–100k	Est. revenue $37k–$101k after Steam's cut $68k–$155k before Steam's cut	$9.99	549 reviews Very Positive	Horror Psychological Horror
Monstrum 2 2022	Est. copies ≈ 25k–41k SteamSpy 50k–100k	Est. revenue Free	Free	1k reviews Mixed	HorrorOnline Co-Op
MirrorMoon EP 2013	Est. copies ≈ 38k–62k SteamSpy 50k–100k	Est. revenue $158k–$425k after Steam's cut $288k–$654k before Steam's cut	$14.99	607 reviews Mixed	IndieExploration
Hello Neighbor Alpha 1 2019	Est. copies ≈ 126k–205k 2.4x vs typical SteamSpy 200k–500k	Est. revenue Free	Free	4k reviews Very Positive	CartoonyHorror
CAPTURED 2024	Est. copies ≈ 17k–28k SteamSpy under 20k	Est. revenue $30k–$82k after Steam's cut $55k–$126k before Steam's cut	$6.45	693 reviews Overwhelmingly Positive	Psychological Horror Horror