How many copies did Transformice sell?

1.3M to 2.2M copies, based on its 29k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Transformice make?

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

How big is Transformice?

Estimated owners: ≈ 1.3M–2.2M; from 29k 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 Transformice out and predicted the genre from its 8 similar games. Every figure here, including Transformice's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 20.6M–40.3M

best case 123.4M (PUBG: BATTLEGROUNDS)

The Co-op 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

≈ 20.6M–40.3M copies

≈ $113.8M–$172.7M after Steam's cut

from ~660k 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 Co-op (3 of 8) and Open World (3 of 8).
The winners: Winners here lead with Survival + Shooter, priced around $14. The breakout hits carry Shooter + PvP + Battle Royale; a typical game here doesn't.
The era: The games you compared span 2013 to 2020, 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
Warframe 2013	Est. copies ≈ 34.9M–56.7M SteamSpy 20M–50M	Est. revenue Free	Free	671k reviews Very Positive	Free to PlayAction RPG
Fall Guys 2020	Est. copies ≈ 12.4M–20.1M SteamSpy 20M–50M	Est. revenue Free	Free	469k reviews Very Positive	MultiplayerParty Game
Unturned 2017	Est. copies ≈ 19.4M–31.5M SteamSpy 50M–100M	Est. revenue Free	Free	564k reviews Very Positive	Free to PlaySurvival
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
ARK: Survival Evolved 2017	Est. copies ≈ 26.6M–43.2M SteamSpy 20M–50M	Est. revenue $109.6M–$294.7M after Steam's cut $199.3M–$453.4M before the cut	$14.99	773k reviews Very Positive	Open World Survival CraftSurvival
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.0M–152.8M 4.1x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
War Thunder 2013	Est. copies ≈ 40.0M–64.9M SteamSpy 20M–50M	Est. revenue Free	Free	768k reviews Mostly Positive	Free to PlaySimulation
Destiny 2 2019	Est. copies ≈ 19.0M–30.9M SteamSpy 20M–50M	Est. revenue Free	Free	660k reviews Mostly Positive	Free to PlayOpen World