How much revenue did Cave Story+ make?

An estimated 1.8M to 4.7M net after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Cave Story+ sell?

Q: How many copies did Cave Story+ sell?

An estimated 425k to 691k copies, based on its 8k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 425k–691k; $1.8M–$4.7M net $3.2M–$7.2M gross; from 8k 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 Cave Story+ out and predicted the genre from its 4 similar games. Every figure here, including Cave Story+'s, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 3.9M–10.0M

best case 24.8M (Hollow Knight)

The Atmospheric lane

A big, proven genre: most sell around 4.5M copies. From a small set, so take it as a sketch.

A typical game

≈ 4.5M copies

≈ $48.1M after Steam's cut

from ~110k reviews

Best case

≈ 24.8M copies

Hollow Knight · ≈ $143.8M after Steam's cut

from 550k reviews

Copies and revenue are rough lifetime estimates from the review count; typical figures are medians per column, so they can come from different games.

The lane you'd be entering

Winners here lead with Metroidvania + Souls-like, priced around $15.
None of the games you compared shipped in the last two years; the newest is from 2020. That says more about your picks than about the market, so add newer similar games to read the timing.
A typical game here lands in Diamond ($1M+ before Steam's cut, est.). Tiers: Chris Zukowski's benchmark tiers.

Similar games

Game	Price	Reviews	Tags	Est. copies	Est. revenue
Ori and the Blind Forest: Definitive Edition 2016	Est. copies ≈ 2.8M–4.6M SteamSpy 2M–5M	Est. revenue $15.6M–$42.0M net $28.4M–$64.5M gross	$19.99	71k reviews Overwhelmingly Positive	AtmosphericGreat Soundtrack +6
Ori and the Will of the Wisps 2020	Est. copies ≈ 3.8M–6.2M SteamSpy 2M–5M	Est. revenue $31.6M–$85.0M net $57.5M–$130.7M gross	$29.99	145k reviews Overwhelmingly Positive	BeautifulMetroidvania +6
INSIDE 2016	Est. copies ≈ 3.0M–4.9M SteamSpy 2M–5M	Est. revenue $20.6M–$55.4M net $37.4M–$85.2M gross	$24.99	75k reviews Overwhelmingly Positive	2.5DPuzzle-Platformer +6
Hollow Knight 2017	Est. copies ≈ 18.9M–30.7M 5.0x vs typical SteamSpy 5M–10M	Est. revenue $77.9M–$209.6M net $141.7M–$322.4M gross	$14.99	550k reviews Overwhelmingly Positive	MetroidvaniaSouls-like +6