How many copies did NERTS! Online sell?

42k to 68k copies, based on its 2k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did NERTS! Online make?

NERTS! Online is free to play, so there is no copy-sales revenue to estimate.

How big is NERTS! Online?

Estimated owners: ≈ 42k–68k; from 2k reviews (Overwhelmingly 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 NERTS! Online out and predicted the genre from its 6 similar games. Every figure here, including NERTS! Online's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 12k–18k

best case 214k (Yi Xian: The Cultivation Card Game)

The Solitaire genre

2 of your 6 similar games are hits. A niche genre: plan for a small audience.

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

A typical game

≈ 12k–18k copies

≈ $36k–$71k after Steam's cut

from ~411 reviews

Best case

≈ 163k–264k copies

Yi Xian: The Cultivation Card Game

A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on Solitaire (5 of 6) and Card Game (4 of 6).
The winners: Winners here lead with Solitaire. The breakout hits carry Free to Play + Card Battler + Turn-Based Tactics; a typical game here doesn't.
The era: Only 1 of your 6 similar games shipped in the last two years. That says more about your picks than about the market, so add newer similar games to read the timing.

Copies and revenue are rough lifetime estimates from the review count.

Similar games

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Yi Xian: The Cultivation Card Game 2024	Est. copies ≈ 163k–264k 17x vs typical SteamSpy 500k–1M	Est. revenue Free	Free	7k reviews Mostly Positive	Free to PlayCard Battler
Poker Master - Texas Hold'em, Roulette, Blackjack, Baccarat, Omaha, Slots, Teen Patti 2020	Est. copies ≈ 137k–223k 13x vs typical SteamSpy 20k–50k	Est. revenue Free	Free	5k reviews Very Positive	Free to PlaySolitaire
Cat Lady - The Card Game 2019	Est. copies ≈ 9k–15k SteamSpy under 20k	Est. revenue $10k–$28k after Steam's cut $19k–$42k before the cut	$3.99	325 reviews Very Positive	CasualStrategy
斗牌魂 2023	Est. copies ≈ 15k–25k 1.6x vs typical SteamSpy 100k–200k	Est. revenue Free	Free	642 reviews Mixed	CasualStrategy
Mystic Vale 2019	Est. copies ≈ 13k–22k SteamSpy under 20k	Est. revenue $48k–$129k after Steam's cut $87k–$198k before the cut	$12.99	466 reviews Very Positive	DeckbuildingStrategy
斗地主少女在线版 2023	Est. copies ≈ 9k–14k SteamSpy 50k–100k	Est. revenue Free	Free	355 reviews Mixed	CasualCard Game