How many copies did Protoball sell?

An estimated 3k to 5k copies, based on its 119 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Protoball make?

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

How big is Protoball?

Estimated owners: ≈ 3k–5k; from 119 reviews (Mostly 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 Protoball out and predicted the genre from its 8 similar games. Every figure here, including Protoball's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 2.8M–5.9M

best case 12.0M (VRChat)

The Multiplayer lane

A big, proven genre: most sell around 3.5M copies.

A typical game

≈ 3.5M copies

≈ $29.9M after Steam's cut

from ~86k reviews

Best case

≈ 12.0M copies

VRChat

from 265k 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 VR + Free to Play, priced around $18.
The games you compared span 2014 to 2023, 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.

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VRChat 2017	Est. copies ≈ 9.1M–14.8M 3.1x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	265k reviews Mostly Positive	VRFree to Play +6
Rec Room 2021	Est. copies ≈ 2.1M–3.3M SteamSpy 2M–5M	Est. revenue Free	Free	83k reviews Very Positive	Free to PlayVR +6
Beat Saber 2019	Est. copies ≈ 2.2M–3.6M SteamSpy 2M–5M	Est. revenue $18.1M–$48.6M net $32.9M–$74.8M gross	$29.99	76k reviews Overwhelmingly Positive	VRRhythm +6
CarX Drift Racing Online 2017	Est. copies ≈ 3.1M–5.0M SteamSpy 2M–5M	Est. revenue $14.3M–$38.4M net $26.0M–$59.1M gross	$16.99	89k reviews Overwhelmingly Positive	RacingPhysics +6
Golf With Your Friends 2020	Est. copies ≈ 2.0M–3.2M SteamSpy 2M–5M	Est. revenue $8.1M–$21.8M net $14.7M–$33.5M gross	$14.99	74k reviews Very Positive	MultiplayerCasual +6
Fishing Planet 2017	Est. copies ≈ 2.6M–4.2M SteamSpy 5M–10M	Est. revenue Free	Free	76k reviews Very Positive	FishingFree to Play +6
Assetto Corsa 2014	Est. copies ≈ 8.9M–14.5M 2.0x vs typical SteamSpy 5M–10M	Est. revenue $49.1M–$132.0M net $89.3M–$203.0M gross	$19.99	172k reviews Very Positive	RacingAutomobile Sim +6
EA SPORTS FC™ 24 2023	Est. copies ≈ 2.7M–4.3M SteamSpy 5M–10M	Est. revenue Free	Free	111k reviews Mixed	Football (Soccer)Sports +6