How many copies did Doorways: Old Prototype sell?

28k to 45k copies, based on its 670 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Doorways: Old Prototype make?

Doorways: Old Prototype is free to play, so there is no copy-sales revenue to estimate.

How big is Doorways: Old Prototype?

Estimated owners: ≈ 28k–45k; from 670 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 Doorways: Old Prototype out and predicted the genre from its 8 similar games. Every figure here, including Doorways: Old Prototype's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 365k–12.1M

best case 27.3M (Phasmophobia)

Games like Doorways: Old Prototype

The middle of these games

≈ 365k–12.1M copies

≈ $1.7M–$42.9M after Steam's cut

from ~125k reviews

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

7 of your 8 similar games are hits.

Best case: Phasmophobia at ≈ 20.8M–33.8M copies, ≈ $114.4M–$307.5M after Steam's cut.

What it took to get here

About half the games that made it here had over 29k reviews in their first month; the spread ran 795 to 114k.

The genre you'd be entering

Your set: Your set clusters on First-Person (8 of 8) and Horror (8 of 8).
The winners: Winners here lead with Horror + Psychological Horror, priced around $20.
The era: The games you compared span 2014 to 2025, and 3 of your 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 70 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
SCP: Secret Laboratory 2017	Est. copies ≈ 8.1M–13.1M 1.9x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	234k reviews Very Positive	Free to PlayMultiplayer
Phasmophobia 2020	Est. copies ≈ 20.8M–33.8M 6.7x vs typical SteamSpy 10M–20M	Est. revenue $114.4M–$307.5M after Steam's cut $207.9M–$473.1M before the cut	$19.99	839k reviews Very Positive	HorrorOnline Co-Op
Lethal Company 2023	Est. copies ≈ 12.7M–20.6M 4.1x vs typical SteamSpy 10M–20M	Est. revenue $34.8M–$93.6M after Steam's cut $63.3M–$143.9M before the cut	$9.99	511k reviews Overwhelmingly Positive	Online Co-OpHorror
Gorilla Tag 2023	Est. copies ≈ 2.1M–3.5M SteamSpy 1M–2M	Est. revenue $11.7M–$31.4M after Steam's cut $21.3M–$48.4M before the cut	$19.99	86k reviews Very Positive	VRPsychological Horror
Escape the Backrooms 2025	Est. copies ≈ 4.1M–6.7M SteamSpy 2M–5M	Est. revenue $11.2M–$30.2M after Steam's cut $20.4M–$46.5M before the cut	$9.99	165k reviews Very Positive	HorrorMultiplayer
White Knuckle 2025	Est. copies ≈ 353k–574k SteamSpy 100k–200k	Est. revenue $1.7M–$4.4M after Steam's cut $3.0M–$6.8M before the cut	$16.99	14k reviews Overwhelmingly Positive	Early AccessParkour
Infinity Runner 2014	Est. copies ≈ 8k–13k SteamSpy 20k–50k	Est. revenue $15k–$41k after Steam's cut $28k–$63k before the cut	$6.99	141 reviews Mixed	ActionIndie
Finding Frankie 2024	Est. copies ≈ 51k–83k SteamSpy 20k–50k	Est. revenue $211k–$566k after Steam's cut $383k–$872k before the cut	$14.99	2k reviews Very Positive	HorrorParkour