How much revenue did Immortal Defense make?

$29k–$79k after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Immortal Defense sell?

Q: How many copies did Immortal Defense sell?

11k to 17k copies, based on its 219 Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 11k–17k; $29k–$79k after Steam's cut $53k–$121k before the cut; from 219 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 Immortal Defense out and predicted the genre from its 8 similar games. Every figure here, including Immortal Defense's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 53k–95k

best case 253k (DG2: Defense Grid 2)

Games like Immortal Defense

The middle of these games

≈ 53k–95k copies

≈ $269k–$487k after Steam's cut

from ~1k reviews

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

6 of your 8 similar games are hits.

Best case: DG2: Defense Grid 2 at ≈ 193k–314k copies, ≈ $530k–$1.4M after Steam's cut.

The genre you'd be entering

Your set: Your set clusters on Sci-fi (6 of 8) and Tower Defense (6 of 8).
The winners: Winners here lead with Tower Defense + Sci-fi, priced around $10.
The era: The games you compared span 2009 to 2023, and none of them 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
Taur 2020	Est. copies ≈ 52k–85k 1.7x vs typical SteamSpy 100k–200k	Est. revenue $359k–$965k after Steam's cut $653k–$1.5M before the cut	$24.99	2k reviews Mostly Positive	Tower DefenseStrategy
MarZ: Tactical Base Defense 2019	Est. copies ≈ 26k–42k SteamSpy 50k–100k	Est. revenue $155k–$416k after Steam's cut $282k–$640k before the cut	$21.99	889 reviews Mostly Positive	StrategyTower Defense
Gratuitous Space Battles 2009	Est. copies ≈ 56k–92k SteamSpy 200k–500k	Est. revenue $232k–$624k after Steam's cut $422k–$960k before the cut	$14.99	891 reviews Mixed	StrategyAuto Battler
Space Run 2014	Est. copies ≈ 120k–195k 1.7x vs typical SteamSpy 200k–500k	Est. revenue $165k–$443k after Steam's cut $299k–$681k before the cut	$4.99	2k reviews Very Positive	Tower DefenseStrategy
DG2: Defense Grid 2 2014	Est. copies ≈ 193k–314k 2.7x vs typical SteamSpy 200k–500k	Est. revenue $530k–$1.4M after Steam's cut $964k–$2.2M before the cut	$9.99	3k reviews Very Positive	StrategyTower Defense
Particle Fleet: Emergence 2016	Est. copies ≈ 53k–87k SteamSpy 50k–100k	Est. revenue $220k–$590k after Steam's cut $399k–$908k before the cut	$14.99	1k reviews Very Positive	StrategyIndie
Space Run Galaxy 2016	Est. copies ≈ 43k–70k SteamSpy 200k–500k	Est. revenue $118k–$318k after Steam's cut $215k–$489k before the cut	$9.99	1k reviews Mixed	StrategyIndie
Tower Tactics: Liberation 2023	Est. copies ≈ 31k–50k SteamSpy 100k–200k	Est. revenue $111k–$298k after Steam's cut $202k–$459k before the cut	$12.99	1k reviews Very Positive	Roguelike Deckbuilder Tower Defense