How many copies did Grabity sell?

11k to 18k copies, based on its 367 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Grabity make?

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

How big is Grabity?

Estimated owners: ≈ 11k–18k; from 367 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 Grabity out and predicted the genre from its 8 similar games. Every figure here, including Grabity's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 2.7M–5.1M

best case 37.1M (Rocket League®)

Games like Grabity

The middle of these games

≈ 2.7M–5.1M copies

≈ $15.0M–$30.1M after Steam's cut

from ~81k 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.

No genre covers most of your similar games. The closest is 4 Player Local (4 of 8), so the genre you lead with is still undecided.

Of the 416 indie games that passed 1,000 reviews in 2022, 11.8% were novel genre mixes and 88.2% stuck to an established genre. Published indie market research.

Best case: Rocket League® at ≈ 28.3M–46.0M copies. A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on 4 Player Local (4 of 8) and Co-op (4 of 8).
The winners: Winners here lead with Fighting + 2D Fighter. The breakout hits carry Free to Play + 2D Platformer + Football (Soccer); a typical game here doesn't.
The era: The games you compared span 2012 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
Castle Crashers® 2012	Est. copies ≈ 8.9M–14.4M 1.7x vs typical SteamSpy 5M–10M	Est. revenue $36.6M–$98.3M after Steam's cut $66.5M–$151.2M before the cut	$14.99	140k reviews Overwhelmingly Positive	2DOnline Co-Op
Brawlhalla 2017	Est. copies ≈ 14.2M–23.0M 5.1x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	411k reviews Mostly Positive	Free to PlayMultiplayer
Overcooked! 2 2018	Est. copies ≈ 2.6M–4.1M SteamSpy 2M–5M	Est. revenue $17.5M–$47.2M after Steam's cut $31.9M–$72.6M before the cut	$24.99	84k reviews Very Positive	MultiplayerOnline Co-Op
Gang Beasts 2017	Est. copies ≈ 2.3M–3.8M SteamSpy 2M–5M	Est. revenue $12.7M–$34.1M after Steam's cut $23.1M–$52.5M before the cut	$19.99	67k reviews Very Positive	FunnyPhysics
Party Animals 2023	Est. copies ≈ 2.0M–3.2M SteamSpy 2M–5M	Est. revenue $10.7M–$28.9M after Steam's cut $19.5M–$44.4M before the cut	$19.99	79k reviews Mostly Positive	MultiplayerFunny
Pummel Party 2018	Est. copies ≈ 1.8M–2.9M SteamSpy 2M–5M	Est. revenue $7.2M–$19.5M after Steam's cut $13.2M–$29.9M before the cut	$14.99	58k reviews Very Positive	MultiplayerFunny
Stick Fight: The Game 2017	Est. copies ≈ 4.3M–7.0M 1.5x vs typical SteamSpy 2M–5M	Est. revenue $5.9M–$15.9M after Steam's cut $10.8M–$24.5M before the cut	$4.99	125k reviews Very Positive	MultiplayerFunny
Rocket League® 2015	Est. copies ≈ 28.3M–46.0M 7.1x vs typical SteamSpy 10M–20M	Est. revenue Free	Free	580k reviews Very Positive	MultiplayerFootball (Soccer)