How many copies did Book of Yog Idle RPG sell?

An estimated 209k to 339k copies, based on its 9k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Book of Yog Idle RPG make?

Book of Yog Idle RPG is free to play, so there is no copy-sales revenue to estimate.

How big is Book of Yog Idle RPG?

Estimated owners: ≈ 209k–339k; from 9k reviews (Mixed)

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 Book of Yog Idle RPG out and predicted the genre from its 8 similar games. Every figure here, including Book of Yog Idle RPG's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 8.9M–14.7M

best case 123.2M (PUBG: BATTLEGROUNDS)

The Multiplayer lane

A big, proven genre, though hit-driven: most sell around 12.0M copies, while a few break out far above.

A typical game

≈ 12.0M copies

≈ $292.3M after Steam's cut

from ~301k 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 $37.
The breakout hits carry Third-Person Shooter + Shooter + Survival; a typical game here doesn't.
The games you compared span 2015 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

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VRChat 2017	Est. copies ≈ 9.1M–14.8M SteamSpy 20M–50M	Est. revenue Free	Free	265k reviews Mostly Positive	VRFree to Play +6
Bloons TD 6 2018	Est. copies ≈ 11.9M–19.3M SteamSpy 2M–5M	Est. revenue $45.6M–$122.7M net $83.0M–$188.7M gross	$13.99	390k reviews Overwhelmingly Positive	Tower DefenseStrategy +6
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 93.9M–152.6M 9.1x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter +6
Z1 Battle Royale 2018	Est. copies ≈ 6.2M–10.0M SteamSpy 10M–20M	Est. revenue Free	Free	203k reviews Mixed	SurvivalMassively Multiplayer +6
NARAKA: BLADEPOINT 2021	Est. copies ≈ 7.5M–12.1M SteamSpy 10M–20M	Est. revenue Free	Free	301k reviews Mostly Positive	Battle RoyaleMultiplayer +6
No Man's Sky 2016	Est. copies ≈ 16.4M–26.7M SteamSpy 5M–10M	Est. revenue $271.3M–$729.5M net $493.3M–$1122.3M gross	$59.99	411k reviews Very Positive	Open WorldOpen World Survival Craft +6
Paladins® 2018	Est. copies ≈ 10.5M–17.1M SteamSpy 10M–20M	Est. revenue Free	Free	345k reviews Very Positive	Hero ShooterFree to Play +6
SMITE® 2015	Est. copies ≈ 5.6M–9.0M SteamSpy 10M–20M	Est. revenue Free	Free	120k reviews Mostly Positive	Free to PlayMOBA +6