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How many copies did Isle of Swaps sell?

Estimated copies sold
≈ 4k–6k
$15k–$41k after Steam's cut $28k–$63k before the cut
from 149 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 Isle of Swaps out and predicted the genre from its 8 similar games. Every figure here, including Isle of Swaps's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 2k–6k
best case 8.2M (Slay the Spire)
Games like Isle of Swaps

The middle of these games

≈ 2k–6k copies

≈ $7k–$33k after Steam's cut

from ~102 reviews

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

2 of your 8 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.

What it took to get here
About half the games that made it here had over 68 reviews in their first month; the spread ran 6 to 435.
Under about 100 in month one, almost nothing recovers.
The genre you'd be entering
Your set
Your set clusters on Roguelike Deckbuilder (8 of 8) and Deckbuilding (7 of 8).
The winners
Winners here lead with Roguelike Deckbuilder + Card Game, priced around $25. The breakout hits carry Singleplayer + Turn-Based + Card Game; a typical game here doesn't.
The era
6 of your 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 that falls with release age, from about 31 for the most recent game here to about 36 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Malice & Greed
2021
Est. copies
≈ 2k–3k
SteamSpy under 20k
Est. revenue
$7k–$18k after Steam's cut $12k–$28k before the cut
$14.99
66 reviews
Mostly Positive
Early AccessRoguelike Deckbuilder
Slay the Spire
2019
Est. copies
≈ 6.3M–10.2M
2137x 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
Daemon Sigil
2025
Est. copies
≈ 273–443
SteamSpy under 20k
Est. revenue
$750–$2k after Steam's cut $1k–$3k before the cut
$9.99
11 reviews
Positive
Card BattlerCreature Collector
Lucky Farm
2024
Est. copies
≈ 794–1k
SteamSpy under 20k
Est. revenue
$653–$2k after Steam's cut $1k–$3k before the cut
$2.99
32 reviews
Positive
The Corpsmen
2024
Est. copies
≈ 3k–4k
SteamSpy under 20k
Est. revenue
$14k–$37k after Steam's cut $25k–$58k before the cut
$19.99
102 reviews
Mixed
Roguelike DeckbuilderCreature Collector
Dicefolk
2024
Est. copies
≈ 27k–45k
11x vs typical
SteamSpy 50k–100k
Est. revenue
$113k–$305k after Steam's cut $206k–$469k before the cut
$14.99
1k reviews
Very Positive
Roguelike DeckbuilderTurn-Based Combat
Dragon Eclipse
2024
Est. copies
≈ 6k–10k
2.5x vs typical
SteamSpy under 20k
Est. revenue
$22k–$60k after Steam's cut $41k–$93k before the cut
$12.99
253 reviews
Mixed
Million Monster Militia
2024
Est. copies
≈ 3k–4k
SteamSpy under 20k
Est. revenue
$7k–$19k after Steam's cut $13k–$29k before the cut
$9.99
103 reviews
Very Positive

Sizing up your own game? See what its genre can realistically do before you build it.