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How many copies did Mirror 2: Project X sell?

Estimated copies sold
≈ 2.9M–4.7M
$1.6M–$4.2M after Steam's cut $2.9M–$6.5M before the cut
from 116k reviews (Mostly Negative)

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 Mirror 2: Project X out and predicted the genre from its 6 similar games. Every figure here, including Mirror 2: Project X's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 505–1k
best case 15.7M (Palworld)
Games like Mirror 2: Project X

The middle of these games

≈ 505–1k copies

≈ $672–$2k after Steam's cut

from ~26 reviews

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

2 of your 6 similar games are hits.

No genre covers most of your similar games. The closest is Co-op (2 of 6), 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: Palworld at ≈ 12.0M–19.4M copies, ≈ $98.7M–$265.3M after Steam's cut. A breakout hit, far above a typical game.

What it took to get here
About half the games that made it here had over 8 reviews in their first month; the spread ran 1 to 470k.
Under about 100 in month one, almost nothing recovers.
The genre you'd be entering
Your set
Your set clusters on Co-op (2 of 6) and Dating Sim (2 of 6).
The winners
Winners here lead with Co-op, priced around $22. The breakout hits carry Multiplayer + Online Co-Op + Co-op; a typical game here doesn't.
The era
The games you compared span 2018 to 2026, and 1 of your 6 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 38 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Key Puss
2022
Est. copies
≈ 1k–2k
1.8x vs typical
SteamSpy under 20k
Est. revenue
$1k–$3k after Steam's cut $2k–$5k before the cut
$3.99
47 reviews
Mixed
CasualIndie
Bloons TD 6
2018
Est. copies
≈ 12.0M–19.5M
15459x vs typical
SteamSpy 2M–5M
Est. revenue
$46.1M–$124.0M after Steam's cut $83.8M–$190.7M before the cut
$13.99
394k reviews
Overwhelmingly Positive
Tower DefenseStrategy
Palworld
2026
Est. copies
≈ 12.0M–19.4M
18921x vs typical
SteamSpy 50M–100M
Est. revenue
$98.7M–$265.3M after Steam's cut $179.4M–$408.2M before the cut
$29.99
482k reviews
Very Positive
Open WorldSurvival
Sweet House Love
2020
Est. copies
≈ 843–1k
SteamSpy under 20k
Est. revenue
$461–$1k after Steam's cut $839–$2k before the cut
$1.99
34 reviews
Mixed
CasualDating Sim
Pop Journey
2023
Est. copies
≈ 273–443
SteamSpy under 20k
Est. revenue
$74–$200 after Steam's cut $135–$307 before the cut
$0.99
11 reviews
Mostly Positive
Match 3Anime
Secrets of Magic 4: Potion Master
2020
Est. copies
≈ 422–685
SteamSpy under 20k
Est. revenue
$1k–$3k after Steam's cut $2k–$5k before the cut
$9.99
17 reviews
Positive
CasualPuzzle

Sizing up your own game? See what its genre can realistically do before you build it.