How many copies did Blockstorm sell?

308k to 501k copies, based on its 6k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Blockstorm make?

Blockstorm is free to play, so there is no copy-sales revenue to estimate.

How big is Blockstorm?

Estimated owners: ≈ 308k–501k; from 6k reviews (Mostly 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 Blockstorm out and predicted the genre from its 8 similar games. Every figure here, including Blockstorm's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 606k–1.1M

best case 104.7M (Garry's Mod)

Games like Blockstorm

The middle of these games

≈ 606k–1.1M copies

≈ $11.3M after Steam's cut

from ~18k 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: Garry's Mod at ≈ 79.8M–129.6M copies, ≈ $219.1M–$589.2M after Steam's cut. A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on FPS (7 of 8) and Building (6 of 8).
The winners: Winners here lead with Sandbox + Moddable, priced around $10. The breakout hits carry Moddable + Physics + Casual; a typical game here doesn't.
The era: The games you compared span 2006 to 2019, 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 36 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
Ace of Spades: Battle Builder unreleased	Est. copies ≈ 449k–729k SteamSpy 1M–2M	Est. revenue Free	Free	18k reviews Mixed	ActionMultiplayer
Garry's Mod 2006	Est. copies ≈ 79.8M–129.6M 70x vs typical SteamSpy 20M–50M	Est. revenue $219.1M–$589.2M after Steam's cut $398.4M–$906.5M before the cut	$9.99	1.3M reviews Overwhelmingly Positive	SandboxModdable
Creative Destruction 2018	Est. copies ≈ 553k–899k SteamSpy 2M–5M	Est. revenue Free	Free	18k reviews Mostly Positive	MultiplayerBattle Royale
BLOCKADE 3D 2014	Est. copies ≈ 1.4M–2.3M SteamSpy 2M–5M	Est. revenue Free	Free	25k reviews Mixed	Free to PlayShooter
BLOCKPOST LEGACY 2019	Est. copies ≈ 474k–770k SteamSpy 1M–2M	Est. revenue Free	Free	16k reviews Mostly Positive	Free to PlayFPS
Hurtworld 2019	Est. copies ≈ 892k–1.4M 1.7x vs typical SteamSpy 500k–1M	Est. revenue $6.1M–$16.5M after Steam's cut $11.1M–$25.4M before the cut	$24.99	31k reviews Mostly Positive	Survival FPS
BLOCKADE 2019	Est. copies ≈ 332k–540k SteamSpy 1M–2M	Est. revenue Free	Free	12k reviews Mostly Positive	Free to PlayAction
Block N Load 2015	Est. copies ≈ 741k–1.2M SteamSpy 2M–5M	Est. revenue Free	Free	15k reviews Mostly Positive	Free to PlayAction