How many copies did M.A.R.S. sell?

29k to 47k copies, based on its 1k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did M.A.R.S. make?

M.A.R.S. is free to play, so there is no copy-sales revenue to estimate.

How big is M.A.R.S.?

Estimated owners: ≈ 29k–47k; from 1k reviews (Mixed)

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 M.A.R.S. out and predicted the genre from its 8 similar games. Every figure here, including M.A.R.S.'s, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 1.1M–3.2M

best case 7.1M (World of Warships)

Games like M.A.R.S.

The middle of these games

≈ 1.1M–3.2M copies

≈ $5.6M–$10.3M 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.

No genre covers most of your similar games. The closest is Shooter (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: World of Warships at ≈ 5.4M–8.7M copies.

What it took to get here

About half the games that made it here had over 4k reviews in their first month; the spread ran 884 to 28k.

The genre you'd be entering

Your set: Your set clusters on Shooter (4 of 8) and Co-op (3 of 8).
The winners: Winners here lead with Naval Combat + Co-op.
The era: The games you compared span 2016 to 2024, and 1 of your 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 52 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
Alien Swarm: Reactive Drop 2017	Est. copies ≈ 818k–1.3M SteamSpy 200k–500k	Est. revenue Free	Free	24k reviews Very Positive	Twin Stick ShooterPvE
Crossout 2017	Est. copies ≈ 2.4M–3.9M 2.0x vs typical SteamSpy 5M–10M	Est. revenue Free	Free	70k reviews Mostly Positive	Third PersonGun Customization
World of Warships 2017	Est. copies ≈ 5.4M–8.7M 4.5x vs typical SteamSpy 20M–50M	Est. revenue Free	Free	156k reviews Mostly Positive	Free to PlayNaval Combat
Plants vs. Zombies: Battle for Neighborville™ 2020	Est. copies ≈ 466k–758k SteamSpy 1M–2M	Est. revenue $3.8M–$10.3M after Steam's cut $7.0M–$15.9M before the cut	$29.99	19k reviews Mostly Positive	MultiplayerThird-Person Shooter
Tom Clancy’s The Division® 2 2023	Est. copies ≈ 886k–1.4M SteamSpy 1M–2M	Est. revenue $7.3M–$19.6M after Steam's cut $13.3M–$30.2M before the cut	$29.99	36k reviews Mostly Positive	Looter ShooterOpen World
Zero Hour 2024	Est. copies ≈ 827k–1.3M SteamSpy 500k–1M	Est. revenue $2.3M–$6.1M after Steam's cut $4.1M–$9.4M before the cut	$9.99	33k reviews Mostly Positive	TacticalShooter
World of Tanks 2021	Est. copies ≈ 2.5M–4.1M 2.9x vs typical SteamSpy 1M–2M	Est. revenue Free	Free	101k reviews Mostly Positive	TanksFree to Play
Infestation: The New Z 2016	Est. copies ≈ 1.4M–2.3M SteamSpy 5M–10M	Est. revenue Free	Free	34k reviews Mixed	ZombiesFree to Play