How many copies did MapleStory sell?

975k to 1.6M copies, based on its 15k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did MapleStory make?

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

How big is MapleStory?

Estimated owners: ≈ 975k–1.6M; from 15k 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 MapleStory out and predicted the genre from its 8 similar games. Every figure here, including MapleStory's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 4.8M–7.1M

best case 9.7M (New World: Aeternum)

Games like MapleStory

The middle of these games

≈ 4.8M–7.1M copies

≈ $32.5M–$52.4M after Steam's cut

from ~128k 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: New World: Aeternum at ≈ 7.4M–12.0M copies.

What it took to get here

About half the games that made it here had over 7k reviews in their first month; the spread ran 14 to 145k.

The genre you'd be entering

Your set: Your set clusters on MMORPG (8 of 8) and Open World (7 of 8).
The winners: Winners here lead with Open World + MMORPG.
The era: The games you compared span 2014 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 70 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
STAR WARS™: The Old Republic™ 2020	Est. copies ≈ 1.9M–3.0M SteamSpy 5M–10M	Est. revenue Free	Free	75k reviews Very Positive	Free to PlayMultiplayer
FINAL FANTASY XIV Online 2014	Est. copies ≈ 4.8M–7.8M SteamSpy 2M–5M	Est. revenue $26.3M–$70.8M after Steam's cut $47.9M–$108.9M before the cut	$19.99	85k reviews Very Positive	MMORPGRPG
The Elder Scrolls® Online 2017	Est. copies ≈ 5.6M–9.0M SteamSpy 5M–10M	Est. revenue $30.5M–$82.1M after Steam's cut $55.5M–$126.2M before the cut	$19.99	161k reviews Very Positive	RPGMMORPG
Black Desert 2017	Est. copies ≈ 3.2M–5.3M SteamSpy 5M–10M	Est. revenue $8.9M–$23.9M after Steam's cut $16.2M–$36.8M before the cut	$9.99	94k reviews Mostly Positive	MMORPGMassively Multiplayer
New World: Aeternum 2021	Est. copies ≈ 7.4M–12.0M 2.3x vs typical SteamSpy 50M–100M	Est. revenue Free	Free	297k reviews Mixed	Open WorldMassively Multiplayer
Secret Of Dungeon 2023	Est. copies ≈ 645–1k too small to compare SteamSpy 20k–50k	Est. revenue Free	Free	26 reviews Mixed	Action2D
Argentum Online 2022	Est. copies ≈ 21k–34k too small to compare SteamSpy 50k–100k	Est. revenue Free	Free	841 reviews Mostly Positive	MMORPGRPG
Lost Ark 2022	Est. copies ≈ 5.0M–8.2M 1.6x vs typical SteamSpy 50M–100M	Est. revenue Free	Free	203k reviews Mostly Positive	MMORPGFree to Play