How much revenue did Summum Aeterna make?

$54k–$146k after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Summum Aeterna sell?

Q: How many copies did Summum Aeterna sell?

10k to 16k copies, based on its 399 Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 10k–16k; $54k–$146k after Steam's cut $99k–$225k before Steam's cut; from 399 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 Summum Aeterna and predicted how it would do from its 8 similar games. Every figure here, including Summum Aeterna's, is estimated from Steam reviews.

Copies, estimated from reviews

typical (middle half) 3.1M–5.1M

best case 12.4M (Deep Rock Galactic)

Games like Summum Aeterna

A typical game among these

≈ 3.1M–5.1M copies

≈ $24.2M–$48.0M after Steam's cut

from ~90k 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: Deep Rock Galactic at ≈ 9.4M–15.3M copies, ≈ $77.8M–$209.2M 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 40k reviews in their first month; the range was 17k to 73k.

The genre you'd be entering

These games: The similar games share Rogue-like (5 of 8) and Action Roguelike (4 of 8).
The winners: Winners here lead with Dwarf + Co-op, priced around $30. The breakout hits carry Dwarf + PvE + Class-Based; a typical game here doesn't.
When they shipped: The similar games span 2011 to 2026, and 1 of the 8 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

Game	Est. copies	Est. revenue	Price	Reviews	Tags
Deep Rock Galactic 2020	Est. copies ≈ 9.4M–15.3M 4.2x vs typical SteamSpy 5M–10M	Est. revenue $77.8M–$209.2M after Steam's cut $141.5M–$321.9M before Steam's cut	$29.99	380k reviews Overwhelmingly Positive	DwarfCo-op
Cult of the Lamb 2022	Est. copies ≈ 3.2M–5.2M SteamSpy 2M–5M	Est. revenue $22.2M–$59.6M after Steam's cut $40.3M–$91.7M before Steam's cut	$24.99	130k reviews Overwhelmingly Positive	Base-BuildingCute
Microsoft Flight Simulator (2020) 40th Anniversary Edition 2026	Est. copies ≈ 1.8M–2.9M SteamSpy 2M–5M	Est. revenue $29.9M–$80.5M after Steam's cut $54.4M–$123.8M before Steam's cut	$59.99	73k reviews Mostly Positive	SimulationFlight
Dead Cells 2018	Est. copies ≈ 5.6M–9.1M 2.0x vs typical SteamSpy 5M–10M	Est. revenue $38.4M–$103.2M after Steam's cut $69.8M–$158.8M before Steam's cut	$24.99	184k reviews Overwhelmingly Positive	AdventureAction Roguelike
Enter the Gungeon 2016	Est. copies ≈ 3.7M–6.1M SteamSpy 2M–5M	Est. revenue $15.4M–$41.5M after Steam's cut $28.1M–$63.9M before Steam's cut	$14.99	90k reviews Overwhelmingly Positive	Bullet HellAction Roguelike
The Binding of Isaac 2011	Est. copies ≈ 4.0M–6.5M SteamSpy 1M–2M	Est. revenue $5.5M–$14.7M after Steam's cut $9.9M–$22.6M before Steam's cut	$4.99	63k reviews Very Positive	Action RoguelikeRogue-like
Noita 2020	Est. copies ≈ 2.2M–3.6M SteamSpy 2M–5M	Est. revenue $12.1M–$32.6M after Steam's cut $22.0M–$50.2M before Steam's cut	$19.99	89k reviews Overwhelmingly Positive	PhysicsRogue-like
Gunfire Reborn 2021	Est. copies ≈ 2.6M–4.2M SteamSpy 2M–5M	Est. revenue $14.2M–$38.1M after Steam's cut $25.7M–$58.5M before Steam's cut	$19.99	104k reviews Very Positive	Rogue-lite FPS