How many copies did Mythgard sell?

33k to 54k copies, based on its 1k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Mythgard make?

Mythgard is free to play, so there is no copy-sales revenue to estimate.

How big is Mythgard?

Estimated owners: ≈ 33k–54k; from 1k reviews (Very 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 Mythgard out and predicted the genre from its 8 similar games. Every figure here, including Mythgard's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.6M–2.5M

best case 8.2M (Slay the Spire)

Games like Mythgard

The middle of these games

≈ 1.6M–2.5M copies

≈ $9.4M after Steam's cut

from ~51k reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

All 8 of your similar games are hits.

Best case: Slay the Spire at ≈ 6.3M–10.2M copies, ≈ $43.1M–$116.0M after Steam's cut. A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on Card Game (6 of 8) and Trading Card Game (5 of 8).
The winners: Winners here lead with Roguelike Deckbuilder + Card Game, priced around $25. The breakout hits carry Roguelike Deckbuilder + Rogue-like + Card Battler; a typical game here doesn't.
The era: None of the games you compared shipped in the last two years; the newest is from 2020. That says more about your picks than about the market, so add newer similar games to read the timing.

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
Dota Underlords 2019	Est. copies ≈ 2.6M–4.3M 1.8x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	91k reviews Very Positive	Free to PlayStrategy
Magic Duels 2015	Est. copies ≈ 1.2M–1.9M SteamSpy 2M–5M	Est. revenue Free	Free	24k reviews Mostly Positive	Free to PlayCard Game
KARDS - The WW2 Card Game 2020	Est. copies ≈ 1.3M–2.1M SteamSpy 2M–5M	Est. revenue Free	Free	51k reviews Mixed	Free to PlayCard Game
GWENT: The Witcher Card Game 2020	Est. copies ≈ 687k–1.1M SteamSpy 1M–2M	Est. revenue Free	Free	28k reviews Very Positive	Free to PlayStrategy
Minion Masters 2019	Est. copies ≈ 1.9M–3.1M SteamSpy 500k–1M	Est. revenue Free	Free	65k reviews Very Positive	PvETrading Card Game
Slay the Spire 2019	Est. copies ≈ 6.3M–10.2M 4.3x vs typical SteamSpy 5M–10M	Est. revenue $43.1M–$116.0M after Steam's cut $78.4M–$178.5M before the cut	$24.99	218k reviews Overwhelmingly Positive	Roguelike DeckbuilderCard Game
Yu-Gi-Oh! Duel Links 2017	Est. copies ≈ 1.5M–2.5M SteamSpy 2M–5M	Est. revenue Free	Free	45k reviews Very Positive	Free to PlayCard Game
UNO 2017	Est. copies ≈ 1.9M–3.0M SteamSpy 2M–5M	Est. revenue $5.1M–$13.8M after Steam's cut $9.3M–$21.2M before the cut	$9.99	54k reviews Mostly Positive	Card GameMultiplayer