How many copies did EMPTY SHELL: PROLOGUE sell?

35k to 57k 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: ≈ 35k–57k; 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) 993k–2.0M

best case 5.2M (The Binding of Isaac)

Games like EMPTY SHELL: PROLOGUE

The middle of these games

≈ 993k–2.0M copies

≈ $4.6M–$9.1M after Steam's cut

from ~35k reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

All 8 of your similar games are hits.

Best case: The Binding of Isaac at ≈ 4.0M–6.4M copies, ≈ $5.4M–$14.6M after Steam's cut.

What it took to get here

About half the games that made it here had over 23k reviews in their first month; the spread ran 10k to 41k.

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.

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
The Binding of Isaac 2011	Est. copies ≈ 4.0M–6.4M 1.8x vs typical SteamSpy 1M–2M	Est. revenue $5.4M–$14.6M after Steam's cut $9.9M–$22.5M before the cut	$4.99	63k reviews Very Positive	Action RoguelikeRogue-like
Soulstone Survivors 2025	Est. copies ≈ 663k–1.1M SteamSpy 500k–1M	Est. revenue $2.7M–$7.3M after Steam's cut $5.0M–$11.3M before the cut	$14.99	27k reviews Very Positive	Action RoguelikeBullet Hell
Halls of Torment 2024	Est. copies ≈ 788k–1.3M SteamSpy 500k–1M	Est. revenue $1.4M–$3.9M after Steam's cut $2.6M–$6.0M before the cut	$6.66	32k reviews Overwhelmingly Positive	Action RoguelikeRogue-lite
Nuclear Throne 2015	Est. copies ≈ 965k–1.6M SteamSpy 500k–1M	Est. revenue $3.2M–$8.6M after Steam's cut $5.8M–$13.2M before the cut	$11.99	20k reviews Overwhelmingly Positive	Action RoguelikeRogue-like
Hero Siege 2014	Est. copies ≈ 2.7M–4.3M SteamSpy 1M–2M	Est. revenue $5.8M–$15.7M after Steam's cut $10.6M–$24.1M before the cut	$7.99	47k reviews Mixed	Action RPGPixel Graphics
Magicraft 2024	Est. copies ≈ 416k–676k SteamSpy 500k–1M	Est. revenue $1.8M–$4.9M after Steam's cut $3.3M–$7.6M 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 $4.3M–$11.5M after Steam's cut $7.7M–$17.6M before the cut	$12.99	48k reviews Very Positive	DwarfAction Roguelike
暖雪 Warm Snow 2022	Est. copies ≈ 968k–1.6M SteamSpy 1M–2M	Est. revenue $4.8M–$12.9M after Steam's cut $8.7M–$19.8M before the cut	$17.99	39k reviews Very Positive	Action RoguelikeRogue-lite