How many copies did Crusader Kings II sell?

3.8M to 6.2M copies, based on its 74k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Crusader Kings II make?

Crusader Kings II is free to play, so there is no copy-sales revenue to estimate.

How big is Crusader Kings II?

Estimated owners: ≈ 3.8M–6.2M; from 74k 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 Crusader Kings II out and predicted the genre from its 8 similar games. Every figure here, including Crusader Kings II's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.7M–3.3M

best case 4.9M (Crusader Kings III)

The Grand Strategy genre

All 8 of your similar games are hits. A big, proven genre for a game like yours.

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

A typical game

≈ 1.7M–3.3M copies

≈ $16.5M–$48.3M after Steam's cut

from ~52k reviews

Best case

≈ 3.7M–6.1M copies

Crusader Kings III · ≈ $51.4M–$138.2M after Steam's cut

The genre you'd be entering

Your set: Your set clusters on Grand Strategy (8 of 8) and Historical (8 of 8).
The winners: Winners here lead with Medieval + Grand Strategy, priced around $50.
The era: The games you compared span 2006 to 2024, a genre with a long track record.

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

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A Total War Saga: THRONES OF BRITANNIA 2018	Est. copies ≈ 451k–732k SteamSpy 500k–1M	Est. revenue $5.0M–$13.3M after Steam's cut $9.0M–$20.5M before the cut	$39.99	15k reviews Mostly Positive	StrategyHistorical
Crusader Kings III 2020	Est. copies ≈ 3.7M–6.1M 2.7x vs typical SteamSpy 2M–5M	Est. revenue $51.4M–$138.2M after Steam's cut $93.5M–$212.7M before the cut	$49.99	142k reviews Very Positive	StrategyMedieval
Total War: MEDIEVAL II – Definitive Edition 2006	Est. copies ≈ 1.9M–3.1M SteamSpy 1M–2M	Est. revenue $12.9M–$34.7M after Steam's cut $23.5M–$53.4M before the cut	$24.99	36k reviews Overwhelmingly Positive	StrategyMedieval