How many copies did Fish Idle 2: Underwater Mystery sell?

40k to 65k copies, based on its 2k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Fish Idle 2: Underwater Mystery make?

Fish Idle 2: Underwater Mystery is free to play, so there is no copy-sales revenue to estimate.

How big is Fish Idle 2: Underwater Mystery?

Estimated players who have it: ≈ 40k–65k; from 2k 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 Fish Idle 2: Underwater Mystery and predicted how it would do from its 8 similar games. Every figure here, including Fish Idle 2: Underwater Mystery's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 469k–959k

best case 1.6M (Deep Rock Galactic: Survivor)

Games like Fish Idle 2: Underwater Mystery

A typical game among these

≈ 469k–959k copies

≈ $2.9M–$5.1M after Steam's cut

from ~20k reviews

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

7 of the 8 similar games are hits.

Best case: Deep Rock Galactic: Survivor at ≈ 1.2M–2.0M copies, ≈ $4.3M–$11.6M after Steam's cut.

What their first month looked like

About half the games that made it here had over 11k reviews in their first month; the range was 1 to 41k.

The genre you'd be entering

These games: The similar games share Arcade (5 of 8) and Action Roguelike (4 of 8).
The winners: Winners here lead with Dwarf + Action Roguelike, priced around $13.
When they shipped: 5 of the 8 similar games shipped in the last two years. You'd be launching into a busy stretch.

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 of about 31, 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
Halls of Torment 2024	Est. copies ≈ 793k–1.3M 1.6x vs typical SteamSpy 500k–1M	Est. revenue $1.5M–$3.9M after Steam's cut $2.6M–$6.0M before Steam's cut	$6.66	32k reviews Overwhelmingly Positive	Action RoguelikeRogue-lite
Soulstone Survivors 2025	Est. copies ≈ 668k–1.1M SteamSpy 500k–1M	Est. revenue $2.8M–$7.4M after Steam's cut $5.0M–$11.4M before Steam's cut	$14.99	27k reviews Very Positive	Action RoguelikeBullet Hell
Candy gun 2021	Est. copies ≈ 124–202 too small to compare SteamSpy 20k–50k	Est. revenue $340–$918 after Steam's cut $619–$1k before Steam's cut	$9.99	5 reviews 5 user reviews	Turn-Based TacticsMatch 3
Yet Another Zombie Survivors 2026	Est. copies ≈ 386k–628k SteamSpy 500k–1M	Est. revenue $1.6M–$4.3M after Steam's cut $2.9M–$6.6M before Steam's cut	$14.99	16k reviews Very Positive	Early AccessAction Roguelike
The WereCleaner 2024	Est. copies ≈ 329k–535k SteamSpy 200k–500k	Est. revenue Free	Free	13k reviews Overwhelmingly Positive	StealthCasual
Deep Rock Galactic: Survivor 2025	Est. copies ≈ 1.2M–2.0M 2.5x vs typical SteamSpy 1M–2M	Est. revenue $4.3M–$11.6M after Steam's cut $7.8M–$17.8M before Steam's cut	$12.99	49k reviews Very Positive	DwarfAction Roguelike
Bombergrounds: Reborn 2022	Est. copies ≈ 207k–336k SteamSpy 1M–2M	Est. revenue Free	Free	8k reviews Very Positive	MultiplayerBattle Royale
Minecraft Dungeons 2021	Est. copies ≈ 487k–792k SteamSpy 1M–2M	Est. revenue $2.7M–$7.2M after Steam's cut $4.9M–$11.1M before Steam's cut	$19.99	20k reviews Very Positive	Dungeon CrawlerHack and Slash