How many copies did Endless Sky sell?

An estimated 327k to 532k copies, based on its 7k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Endless Sky make?

Endless Sky is free to play, so there is no copy-sales revenue to estimate.

How big is Endless Sky?

Estimated owners: ≈ 327k–532k; from 7k 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 Endless Sky out and predicted the genre from its 8 similar games. Every figure here, including Endless Sky's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 4.5M–9.8M

best case 24.9M (Destiny 2)

The Open World lane

A big, proven genre: most sell around 5.6M copies.

A typical game

≈ 5.6M copies

≈ $95.7M after Steam's cut

from ~160k reviews

Best case

≈ 24.9M copies

Destiny 2

from 659k reviews

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 Free to Play + Open World, priced around $32.
The games you compared span 2012 to 2021, 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
Stormworks: Build and Rescue 2020	Est. copies ≈ 1.6M–2.5M SteamSpy 1M–2M	Est. revenue $10.7M–$28.8M net $19.5M–$44.3M gross	$24.99	59k reviews Very Positive	SandboxBase-Building +6
RimWorld 2018	Est. copies ≈ 7.4M–12.0M 1.5x vs typical SteamSpy 5M–10M	Est. revenue $70.9M–$190.6M net $128.9M–$293.3M gross	$34.99	242k reviews Overwhelmingly Positive	Colony SimBase-Building +6
ASTRONEER 2019	Est. copies ≈ 4.0M–6.5M SteamSpy 2M–5M	Est. revenue $32.9M–$88.5M net $59.8M–$136.1M gross	$29.99	139k reviews Very Positive	MultiplayerOpen World +6
Stellaris 2016	Est. copies ≈ 7.8M–12.7M SteamSpy 2M–5M	Est. revenue $107.6M–$289.4M net $195.7M–$445.2M gross	$49.99	196k reviews Very Positive	SpaceGrand Strategy +6
Destiny 2 2019	Est. copies ≈ 19.0M–30.8M 4.1x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	659k reviews Mostly Positive	Free to PlayOpen World +6
PlanetSide 2 2012	Est. copies ≈ 3.9M–6.3M SteamSpy 5M–10M	Est. revenue Free	Free	75k reviews Very Positive	Free to PlayFPS +6
STAR WARS™: The Old Republic™ 2020	Est. copies ≈ 2.0M–3.2M SteamSpy 5M–10M	Est. revenue Free	Free	74k reviews Very Positive	Free to PlayMultiplayer +6
Halo Infinite 2021	Est. copies ≈ 4.5M–7.3M SteamSpy 10M–20M	Est. revenue Free	Free	181k reviews Mixed	Free to PlayFPS +6