How many copies did EMPTY SHELL: PROLOGUE sell?

34k to 55k copies, based on its 1k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did EMPTY SHELL: PROLOGUE make?

EMPTY SHELL: PROLOGUE is free to play, so there is no copy-sales revenue to estimate.

How big is EMPTY SHELL: PROLOGUE?

Estimated owners: ≈ 34k–55k; from 1k 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 EMPTY SHELL: PROLOGUE out and predicted the genre from its 8 similar games. Every figure here, including EMPTY SHELL: PROLOGUE's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.1M–2.8M

best case 4.3M (The Binding of Isaac)

The Action Roguelike 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

≈ 1.1M–2.8M copies

≈ $5.5M–$8.4M after Steam's cut

from ~43k reviews

Best case

≈ 3.3M–5.3M copies

The Binding of Isaac · ≈ $4.5M–$12.0M after Steam's cut

The genre you'd be entering

Your set: Your set clusters on Action Roguelike (8 of 8) and Rogue-like (6 of 8).
The winners: Winners here lead with Action Roguelike + Rogue-like, priced around $5.
The era: 4 of your 8 similar games shipped in the last two years, so this niche is actively shipping.

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

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
The Binding of Isaac 2011	Est. copies ≈ 3.3M–5.3M SteamSpy 1M–2M	Est. revenue $4.5M–$12.0M after Steam's cut $8.1M–$18.5M before the cut	$4.99	63k reviews Very Positive	Action RoguelikeRogue-like
Soulstone Survivors 2025	Est. copies ≈ 639k–1.0M SteamSpy 500k–1M	Est. revenue $2.6M–$7.1M after Steam's cut $4.8M–$10.9M before the cut	$14.99	27k reviews Very Positive	Action RoguelikeBullet Hell
Halls of Torment 2024	Est. copies ≈ 759k–1.2M SteamSpy 500k–1M	Est. revenue $1.4M–$3.7M after Steam's cut $2.5M–$5.8M before the cut	$6.66	32k reviews Overwhelmingly Positive	Action RoguelikeRogue-lite
Nuclear Throne 2015	Est. copies ≈ 913k–1.5M too small to compare SteamSpy 500k–1M	Est. revenue $3.0M–$8.1M after Steam's cut $5.5M–$12.5M before the cut	$11.99	20k reviews Overwhelmingly Positive	Action RoguelikeRogue-like
Hero Siege 2014	Est. copies ≈ 2.4M–4.0M SteamSpy 1M–2M	Est. revenue $5.4M–$14.4M after Steam's cut $9.7M–$22.2M before the cut	$7.99	47k reviews Mixed	Action RPGPixel Graphics
Magicraft 2024	Est. copies ≈ 400k–650k too small to compare SteamSpy 500k–1M	Est. revenue $1.8M–$4.7M after Steam's cut $3.2M–$7.3M before the cut	$15.99	17k reviews Very Positive	Action RoguelikeRogue-lite
Deep Rock Galactic: Survivor 2025	Est. copies ≈ 1.2M–1.9M SteamSpy 1M–2M	Est. revenue $4.1M–$11.0M after Steam's cut $7.5M–$17.0M before the cut	$12.99	48k reviews Very Positive	DwarfAction Roguelike
暖雪 Warm Snow 2022	Est. copies ≈ 933k–1.5M SteamSpy 1M–2M	Est. revenue $4.6M–$12.4M after Steam's cut $8.4M–$19.1M before the cut	$17.99	39k reviews Very Positive	Action RoguelikeRogue-lite