How many copies did Crusader Kings II sell?

4.7M to 7.6M 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 players who have it: ≈ 4.7M–7.6M; from 74k reviews (Very Positive)

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 Crusader Kings II and predicted how it would do from its 8 similar games. Every figure here, including Crusader Kings II's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 1.8M–3.4M

best case 4.6M (Crusader Kings III)

Games like Crusader Kings II

A typical game among these

≈ 1.8M–3.4M copies

≈ $11.6M–$56.0M after Steam's cut

from ~53k reviews

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

All 8 of the similar games are hits.

Best case: Crusader Kings III at ≈ 3.5M–5.7M copies, ≈ $48.6M–$130.7M after Steam's cut.

What their first month looked like

About half the games that made it here had over 22k reviews in their first month; the range was 2k to 44k.

The genre you'd be entering

These games: The similar games share Grand Strategy (8 of 8) and Historical (8 of 8).
The winners: Winners here lead with Medieval + Grand Strategy, priced around $50.
When they shipped: The similar games span 2006 to 2024, and 1 of the 7 shipped in the last two years.

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 79 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
Total War: SHOGUN 2 unreleased	Est. copies ≈ 1.7M–2.7M SteamSpy 2M–5M	Est. revenue Free	Free	68k reviews Very Positive	StrategyHistorical
Manor Lords 2024	Est. copies ≈ 2.3M–3.7M 1.8x vs typical SteamSpy 2M–5M	Est. revenue $25.3M–$68.1M after Steam's cut $46.1M–$104.8M before Steam's cut	$39.99	93k reviews Very Positive	StrategyCity Builder
Total War: SHOGUN 2 2011	Est. copies ≈ 4.3M–7.0M SteamSpy 2M–5M	Est. revenue $35.4M–$95.2M after Steam's cut $64.4M–$146.5M before Steam's cut	$29.99	68k reviews Very Positive	StrategyHistorical
Total War: ATTILA 2015	Est. copies ≈ 1.8M–3.0M SteamSpy 2M–5M	Est. revenue $10.1M–$27.3M after Steam's cut $18.4M–$41.9M before Steam's cut	$19.99	38k reviews Very Positive	StrategyHistorical
Knights of Honor II: Sovereign 2022	Est. copies ≈ 168k–273k SteamSpy 100k–200k	Est. revenue $2.1M–$5.6M after Steam's cut $3.8M–$8.6M before Steam's cut	$44.99	7k reviews Mostly Positive	StrategySimulation
A Total War Saga: THRONES OF BRITANNIA 2018	Est. copies ≈ 453k–737k SteamSpy 500k–1M	Est. revenue $2.5M–$6.7M after Steam's cut $4.5M–$10.3M before Steam's cut	$19.99	15k reviews Mostly Positive	StrategyHistorical
Crusader Kings III 2020	Est. copies ≈ 3.5M–5.7M 2.7x vs typical SteamSpy 2M–5M	Est. revenue $48.6M–$130.7M after Steam's cut $88.4M–$201.1M before Steam's cut	$49.99	143k reviews Very Positive	StrategyMedieval
Total War: MEDIEVAL II – Definitive Edition 2006	Est. copies ≈ 2.3M–3.8M SteamSpy 1M–2M	Est. revenue $12.7M–$34.1M after Steam's cut $23.1M–$52.5M before Steam's cut	$19.99	37k reviews Overwhelmingly Positive	StrategyMedieval