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How many copies did STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™ sell?

Estimated copies sold
≈ 1.6M–2.7M
$4.5M–$12.2M after Steam's cut $8.2M–$18.7M before Steam's cut
from 26k 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 STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™ and predicted how it would do from its 8 similar games. Every figure here, including STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™'s, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 5.7M–16.9M
best case 32.0M (Cyberpunk 2077)
Games like STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™

A typical game among these

≈ 5.7M–16.9M copies

≈ $103.8M–$132.3M after Steam's cut

from ~154k 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: Cyberpunk 2077 at ≈ 24.4M–39.6M copies, ≈ $402.0M–$1080.8M after Steam's cut. It is a breakout hit, far above a typical game.

What their first month looked like
About half the games that made it here had over 30k reviews in their first month; the range was 25k to 326k.
The genre you'd be entering
These games
The similar games share Open World (7 of 8) and Story Rich (7 of 8).
The winners
Winners here lead with Cyberpunk + Open World, priced around $60. The breakout hits carry Cyberpunk + Nudity + Sci-fi; a typical game here doesn't.
When they shipped
The similar games span 2010 to 2022, and none of them 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

Horizon Zero Dawn™ Complete Edition
2020
Est. copies
≈ 3.2M–5.2M
SteamSpy 1M–2M
Est. revenue
Free		 Free
128k reviews
Very Positive
Open WorldAdventure
Marvel’s Spider-Man Remastered
2022
Est. copies
≈ 3.6M–5.8M
SteamSpy 2M–5M
Est. revenue
$59.0M–$158.6M after Steam's cut $107.3M–$244.0M before Steam's cut		 $59.99
144k reviews
Overwhelmingly Positive
Open WorldSuperhero
Fallout: New Vegas
2010
Est. copies
≈ 16.6M–26.9M
1.7x vs typical
SteamSpy 5M–10M
Est. revenue
$45.5M–$122.3M after Steam's cut $82.7M–$188.2M before Steam's cut		 $9.99
262k reviews
Overwhelmingly Positive
Open WorldRPG
Cyberpunk 2077
2020
Est. copies
≈ 24.4M–39.6M
6.4x vs typical
SteamSpy 20M–50M
Est. revenue
$402.0M–$1080.8M after Steam's cut $730.9M–$1662.7M before Steam's cut		 $59.99
983k reviews
Very Positive
CyberpunkOpen World
Fallout 4
2015
Est. copies
≈ 21.0M–34.1M
2.8x vs typical
SteamSpy 10M–20M
Est. revenue
$115.2M–$309.7M after Steam's cut $209.4M–$476.5M before Steam's cut		 $19.99
429k reviews
Very Positive
Open WorldPost-apocalyptic
NieR:Automata™
2017
Est. copies
≈ 5.3M–8.6M
SteamSpy 2M–5M
Est. revenue
$58.2M–$156.5M after Steam's cut $105.8M–$240.7M before Steam's cut		 $39.99
154k reviews
Very Positive
Great SoundtrackStory Rich
STAR WARS Jedi: Fallen Order™
2019
Est. copies
≈ 5.1M–8.2M
SteamSpy 2M–5M
Est. revenue
$55.6M–$149.5M after Steam's cut $101.1M–$230.0M before Steam's cut		 $39.99
176k reviews
Very Positive
Action-AdventureSouls-like
BioShock Infinite
2013
Est. copies
≈ 9.2M–15.0M
SteamSpy 2M–5M
Est. revenue
$76.0M–$204.4M after Steam's cut $138.2M–$314.4M before Steam's cut		 $29.99
146k reviews
Very Positive
FPSStory Rich

Sizing up your own game? See how many copies games in its genre usually sell before you build it.