How many copies did Project Morpheus: Prologue sell?

An estimated 13k to 22k copies, based on its 540 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 540 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–36.8M

best case 123.2M (PUBG: BATTLEGROUNDS)

The Multiplayer lane

A big, proven genre, though hit-driven: most sell around 28.2M copies, while a few break out far above.

A typical game

≈ 28.2M copies

≈ $163.6M after Steam's cut

from ~538k reviews

Best case

≈ 123.2M copies

PUBG: BATTLEGROUNDS

from 2.7M reviews

A breakout hit, far above a typical game.

7 of your 8 games sit in the typical range; 1 is a breakout hit far above it.

Copies and revenue are rough lifetime estimates from the review count; typical figures are medians per column, so they can come from different games.

The lane you'd be entering

Winners here lead with Survival + Shooter, priced around $14.
The breakout hits carry Shooter + Battle Royale + PvP; a typical game here doesn't.
The games you compared span 2011 to 2024, a lane with a long track record.
A typical game here lands in Diamond ($1M+ before Steam's cut, est.). Tiers: Chris Zukowski's benchmark tiers.

Similar games

Game	Price	Reviews	Tags	Est. copies	Est. revenue
Bloons TD 6 2018	Est. copies ≈ 11.9M–19.3M SteamSpy 2M–5M	Est. revenue $45.6M–$122.7M net $83.0M–$188.8M gross	$13.99	390k reviews Overwhelmingly Positive	Tower DefenseStrategy +6
Geometry Dash 2014	Est. copies ≈ 32.1M–52.1M SteamSpy 5M–10M	Est. revenue $44.0M–$118.4M net $80.0M–$182.1M gross	$4.99	617k reviews Very Positive	DifficultMusic +6
Portal 2 2011	Est. copies ≈ 24.1M–39.1M SteamSpy 5M–10M	Est. revenue $66.1M–$177.7M net $120.2M–$273.4M gross	$9.99	463k reviews Overwhelmingly Positive	PlatformerPuzzle +6
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 93.9M–152.6M 5.1x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter +6
The Forest 2018	Est. copies ≈ 20.6M–33.4M SteamSpy 20M–50M	Est. revenue $113.1M–$304.2M net $205.7M–$467.9M gross	$19.99	677k reviews Overwhelmingly Positive	Open World Survival CraftSurvival +6
PAYDAY 2 2013	Est. copies ≈ 35.0M–56.9M SteamSpy 20M–50M	Est. revenue $96.2M–$258.6M net $174.9M–$397.8M gross	$9.99	673k reviews Very Positive	Co-opAction +6
Don't Starve Together 2016	Est. copies ≈ 21.5M–35.0M SteamSpy 10M–20M	Est. revenue $88.7M–$238.4M net $161.2M–$366.8M gross	$14.99	538k reviews Very Positive	SurvivalOpen World Survival Craft +6
7 Days to Die 2024	Est. copies ≈ 9.7M–15.7M SteamSpy 10M–20M	Est. revenue $119.5M–$321.3M net $217.2M–$494.2M gross	$44.99	402k reviews Very Positive	SurvivalZombies +6