How much revenue did The Callisto Protocol™ make?

$17.9M–$48.1M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did The Callisto Protocol™ sell?

Q: How many copies did The Callisto Protocol™ sell?

1.1M to 1.8M copies, based on its 44k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 1.1M–1.8M; $17.9M–$48.1M after Steam's cut $32.5M–$74.0M before Steam's cut; from 44k reviews (Mixed)

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 The Callisto Protocol™ and predicted how it would do from its 4 similar games. Every figure here, including The Callisto Protocol™'s, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 10.4M–15.6M

best case 16.6M (Lethal Company)

Games like The Callisto Protocol™

A typical game among these

≈ 10.4M–15.6M copies

≈ $52.3M–$114.2M after Steam's cut

from ~301k 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 4 of the similar games are hits.

This comes from a small set of games, so take it as a sketch.

Best case: Lethal Company at ≈ 12.7M–20.6M copies, ≈ $34.8M–$93.6M after Steam's cut.

The genre you'd be entering

These games: The similar games share First-Person (3 of 4) and Horror (3 of 4).
The winners: Winners here lead with Horror + First-Person, priced around $10.
When they shipped: The similar games span 2016 to 2024, and 1 of the 4 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 52 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
DOOM 2016	Est. copies ≈ 9.2M–15.0M SteamSpy 5M–10M	Est. revenue $50.7M–$136.4M after Steam's cut $92.3M–$209.9M before Steam's cut	$19.99	222k reviews Overwhelmingly Positive	FPSGore
Lethal Company 2023	Est. copies ≈ 12.7M–20.6M 1.7x vs typical SteamSpy 10M–20M	Est. revenue $34.8M–$93.6M after Steam's cut $63.3M–$144.0M before Steam's cut	$9.99	511k reviews Overwhelmingly Positive	Online Co-OpHorror
Subnautica 2018	Est. copies ≈ 11.6M–18.8M SteamSpy 5M–10M	Est. revenue $95.5M–$256.7M after Steam's cut $173.6M–$395.0M before Steam's cut	$29.99	381k reviews Overwhelmingly Positive	Open World Survival CraftSurvival
Content Warning 2024	Est. copies ≈ 4.1M–6.6M SteamSpy 5M–10M	Est. revenue $8.9M–$24.0M after Steam's cut $16.2M–$36.9M before Steam's cut	$7.99	164k reviews Very Positive	Online Co-OpHorror