How many copies did Project Morpheus: Prologue sell?

13k to 22k copies, based on its 541 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Project Morpheus: Prologue make?

Project Morpheus: Prologue is free to play, so there is no copy-sales revenue to estimate.

How big is Project Morpheus: Prologue?

Estimated owners: ≈ 13k–22k; from 541 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 Project Morpheus: Prologue out and predicted the genre from its 8 similar games. Every figure here, including Project Morpheus: Prologue's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 21.3M–37.1M

best case 123.4M (PUBG: BATTLEGROUNDS)

The Survival 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

≈ 21.3M–37.1M copies

≈ $103.3M–$193.3M after Steam's cut

from ~539k reviews

Best case

≈ 94.0M–152.8M copies

PUBG: BATTLEGROUNDS

A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on Survival (4 of 8) and Co-op (3 of 8).
The winners: Winners here lead with Survival + Shooter. The breakout hits carry Shooter + Battle Royale + PvP; a typical game here doesn't.
The era: The games you compared span 2011 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
Bloons TD 6 2018	Est. copies ≈ 11.9M–19.3M SteamSpy 2M–5M	Est. revenue $45.7M–$122.9M after Steam's cut $83.1M–$189.2M before the cut	$13.99	391k reviews Overwhelmingly Positive	Tower DefenseStrategy
Geometry Dash 2014	Est. copies ≈ 32.4M–52.6M SteamSpy 5M–10M	Est. revenue $44.4M–$119.5M after Steam's cut $80.8M–$183.9M before the cut	$4.99	623k reviews Very Positive	DifficultMusic
Portal 2 2011	Est. copies ≈ 24.1M–39.2M SteamSpy 5M–10M	Est. revenue $66.3M–$178.1M after Steam's cut $120.5M–$274.1M before the cut	$9.99	464k reviews Overwhelmingly Positive	Platformer Puzzle
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.0M–152.8M 5.1x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
The Forest 2018	Est. copies ≈ 20.6M–33.5M SteamSpy 20M–50M	Est. revenue $113.4M–$304.8M after Steam's cut $206.1M–$468.9M before the cut	$19.99	678k reviews Overwhelmingly Positive	Open World Survival CraftSurvival
PAYDAY 2 2013	Est. copies ≈ 35.0M–56.9M SteamSpy 20M–50M	Est. revenue $96.2M–$258.7M after Steam's cut $174.9M–$398.0M before the cut	$9.99	674k reviews Very Positive	Co-opAction
Don't Starve Together 2016	Est. copies ≈ 21.6M–35.1M SteamSpy 10M–20M	Est. revenue $88.9M–$239.1M after Steam's cut $161.7M–$367.9M before the cut	$14.99	539k reviews Very Positive	SurvivalOpen World Survival Craft
7 Days to Die 2024	Est. copies ≈ 9.7M–15.7M SteamSpy 10M–20M	Est. revenue $119.8M–$322.1M after Steam's cut $217.8M–$495.5M before the cut	$44.99	403k reviews Very Positive	SurvivalZombies