How many people are playing Core Defense – Mastery Expansion right now?

Core Defense – Mastery Expansion is app 1563040 on Steam. Player counts appear once the tracker has sampled it.

When was Core Defense – Mastery Expansion released on Steam?

Core Defense – Mastery Expansion was released on Steam on 19 Mar 2021.

Status

SteamPeaks

Core Defense – Mastery Expansion

DlcApp ID 1,563,040by ehmprahReleased 19 Mar 2021

Windows · macOS · LinuxEngine —

View on SteamSteamCompare

App ID1,563,040

Release date19 Mar 2021

Engine—

Install size—

TypeDlc

Last update7 Sep 2026

Steam Deck—

DLC0

Developerehmprah

Changenumber26,201,212

Price—

Packages0

Publisherehmprah

SystemsWindows · macOS · Linux

Followers—

Depots0

Compare this game

Core Defense – Mastery Expansion

ehmprah
Released 19 Mar 2021·App 1563040

Steam user reviews

Not enough reviews yet

0 so far · summary at 10

SteamPeaks Rating

Not enough reviews yet

Rated from 10 reviews

How it works

Playing now

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First samples arriving

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All-time peak

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Tracking since the first sample

Steam charts

Playing now

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24-hour peak

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All-time peak

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30-day average

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Rank right now

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Waiting for the first sampleData by SteamPeaks.com

24h

Core Defense – Mastery Expansion Charts · SteamPeaks

Tracking since since today

Launch retention

Open in Compare—

Launch retention needs samples from the first day after release. SteamPeaks started sampling this app since today; the curve appears for launches tracked from their unlock.

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Now · of launch peak

Days above 1,000,000 in 2026

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Weekend peak this week

Milestone	Core Defense – Mastery Expansion	Genre median
Launch peak	—	—
Hour 1	—	—
Hour 24	—	—
Hour 72	—	—
Day 7	—	—
Now	—	—

Daily peak · last 14 days	Peak

Estimates · not Steam data

Owner estimates

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Every figure here is derived, shown as a range, and links to its method. Steam does not publish owner counts.

Source	Estimated owners	Method	Confidence
SteamPeaks	Fewer than 50 reviews: not estimated	Reviews × k, calibrated on announced figures · How it works	—

Core Defense – Mastery Expansion

Steam charts

Core Defense – Mastery Expansion

Steam charts

Monthly breakdown

Launch retention

Store data

Owner estimates