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How many copies did Over-Run (The Day The World Ended) sell?

Estimated copies sold
≈ 74–121
$61–$164 after Steam's cut $111–$253 before the cut
from 3 reviews (3 user reviews)
Thin evidence: 3 reviews. That range swings on one or two people, so read it as a hint, not a measurement.

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 Over-Run (The Day The World Ended) out and predicted the genre from its 8 similar games. Every figure here, including Over-Run (The Day The World Ended)'s, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 10.0M–23.7M
best case 87.5M (Left 4 Dead 2)
Games like Over-Run (The Day The World Ended)

The middle of these games

≈ 10.0M–23.7M copies

≈ $109.2M–$341.7M after Steam's cut

from ~278k 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: Left 4 Dead 2 at ≈ 66.7M–108.4M copies, ≈ $183.2M–$492.6M after Steam's cut.

The genre you'd be entering
Your set
Your set clusters on FPS (5 of 8) and Shooter (5 of 8).
The winners
Winners here lead with Zombies + Co-op, priced around $10.
The era
The games you compared span 2004 to 2020, 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

Half-Life 2
2004
Est. copies
≈ 17.6M–28.6M
SteamSpy 10M–20M
Est. revenue
$48.3M–$130.0M after Steam's cut $87.9M–$200.0M before the cut
$9.99
278k reviews
Overwhelmingly Positive
FPSAction
DayZ
2018
Est. copies
≈ 14.2M–23.1M
1.7x vs typical
SteamSpy 10M–20M
Est. revenue
$195.8M–$526.4M after Steam's cut $356.0M–$809.9M before the cut
$49.99
469k reviews
Mostly Positive
SurvivalOpen World
Call of Duty®: Black Ops III
2015
Est. copies
≈ 11.4M–18.4M
SteamSpy 5M–10M
Est. revenue
$187.3M–$503.5M after Steam's cut $340.5M–$774.7M before the cut
$59.99
233k reviews
Very Positive
MultiplayerZombies
Resident Evil 2
2019
Est. copies
≈ 6.4M–10.4M
SteamSpy 5M–10M
Est. revenue
$70.1M–$188.4M after Steam's cut $127.4M–$289.8M before the cut
$39.99
221k reviews
Overwhelmingly Positive
ZombiesSurvival Horror
Left 4 Dead 2
2009
Est. copies
≈ 66.7M–108.4M
3.8x vs typical
SteamSpy 50M–100M
Est. revenue
$183.2M–$492.6M after Steam's cut $333.1M–$757.9M before the cut
$9.99
1.1M reviews
Overwhelmingly Positive
ZombiesCo-op
Hunt: Showdown 1896
2019
Est. copies
≈ 8.0M–13.0M
SteamSpy 10M–20M
Est. revenue
$87.8M–$236.2M after Steam's cut $159.7M–$363.4M before the cut
$39.99
277k reviews
Mostly Positive
Open WorldExtraction Shooter
Unturned
2017
Est. copies
≈ 19.4M–31.6M
2.0x vs typical
SteamSpy 50M–100M
Est. revenue
Free
Free
565k reviews
Very Positive
Free to PlaySurvival
Black Mesa
2020
Est. copies
≈ 3.6M–5.8M
SteamSpy 2M–5M
Est. revenue
$19.7M–$53.0M after Steam's cut $35.8M–$81.5M before the cut
$19.99
145k reviews
Very Positive
FPSRemake

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