How many copies did Book of Yog Idle RPG sell?

209k to 340k 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–340k; 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 123.4M (PUBG: BATTLEGROUNDS)

The Battle Royale 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

≈ 8.9M–14.7M copies

≈ $188.6M–$397.2M after Steam's cut

from ~301k 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 Battle Royale (3 of 8) and FPS (3 of 8).
The winners: 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 era: The games you compared span 2015 to 2021, 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
VRChat 2017	Est. copies ≈ 9.1M–14.9M SteamSpy 20M–50M	Est. revenue Free	Free	266k reviews Mostly Positive	VRFree to Play
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
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.0M–152.8M 9.1x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
Z1 Battle Royale 2018	Est. copies ≈ 6.2M–10.0M SteamSpy 10M–20M	Est. revenue Free	Free	203k reviews Mixed	SurvivalMassively Multiplayer
NARAKA: BLADEPOINT 2021	Est. copies ≈ 7.5M–12.1M SteamSpy 10M–20M	Est. revenue Free	Free	301k reviews Mostly Positive	Battle RoyaleMultiplayer
No Man's Sky 2016	Est. copies ≈ 16.5M–26.8M SteamSpy 5M–10M	Est. revenue $271.9M–$731.1M after Steam's cut $494.4M–$1124.8M before the cut	$59.99	412k reviews Very Positive	Open WorldOpen World Survival Craft
Paladins® 2018	Est. copies ≈ 10.5M–17.1M SteamSpy 10M–20M	Est. revenue Free	Free	345k reviews Very Positive	Hero ShooterFree to Play
SMITE® 2015	Est. copies ≈ 5.6M–9.0M SteamSpy 10M–20M	Est. revenue Free	Free	120k reviews Mostly Positive	Free to PlayMOBA