How many copies did Book of Yog Idle RPG sell?

224k to 363k 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 players who have it: ≈ 224k–363k; from 9k reviews (Mixed)

Copies are estimated from the public review count, adjusted for release year, and cross-checked against SteamSpy's own estimate.

Did the prediction match what actually happened?

We hid Book of Yog Idle RPG and predicted how it would do from its 8 similar games. Every figure here, including Book of Yog Idle RPG's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 10.4M–15.3M

best case 125.7M (PUBG: BATTLEGROUNDS)

Games like Book of Yog Idle RPG

A typical game among these

≈ 10.4M–15.3M copies

≈ $197.4M–$421.5M after Steam's cut

from ~324k reviews

Only the top fifth of 2019's Steam releases earned $34k or more before Steam's cut, so plan for that or less.

All 8 of the similar games are hits.

No genre covers most of these similar games. The closest is Battle Royale (3 of 8), so its genre is hard to place.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: PUBG: BATTLEGROUNDS at ≈ 95.8M–155.7M copies. It is a breakout hit, far above a typical game.

The genre you'd be entering

These games: The similar games share Battle Royale (3 of 8) and FPS (3 of 8).
The winners: Winners here lead with Survival + Shooter. The breakout hits carry Third-Person Shooter + Shooter + Survival; a typical game here doesn't.
When they shipped: The similar games span 2015 to 2021, and none of them shipped in the last two years.

How these numbers were worked out

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

Copies come from each game's reviews times a sales-per-review rate that falls with release age, from about 31 for the most recent game here to about 61 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
VRChat 2017	Est. copies ≈ 9.3M–15.1M SteamSpy 20M–50M	Est. revenue Free	Free	269k reviews Mostly Positive	VRFree to Play
Bloons TD 6 2018	Est. copies ≈ 12.0M–19.6M SteamSpy 2M–5M	Est. revenue $46.3M–$124.5M after Steam's cut $84.2M–$191.5M before Steam's cut	$13.99	396k reviews Overwhelmingly Positive	Tower DefenseStrategy
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 95.8M–155.7M 8.6x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.8M reviews Mixed	SurvivalShooter
Z1 Battle Royale 2018	Est. copies ≈ 6.2M–10.0M SteamSpy 10M–20M	Est. revenue Free	Free	202k reviews Mixed	SurvivalMassively Multiplayer
NARAKA: BLADEPOINT 2021	Est. copies ≈ 7.5M–12.2M SteamSpy 10M–20M	Est. revenue Free	Free	303k reviews Mostly Positive	Battle RoyaleMultiplayer
No Man's Sky 2016	Est. copies ≈ 17.5M–28.5M SteamSpy 5M–10M	Est. revenue $289.3M–$777.8M after Steam's cut $526.0M–$1196.6M before Steam's cut	$59.99	422k 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 ≈ 5.9M–9.5M too small to compare SteamSpy 10M–20M	Est. revenue Free	Free	120k reviews Mostly Positive	Free to PlayMOBA