How many people are playing Mars Underground right now?

Mars Underground is app 578420 on Steam. Player counts appear once the tracker has sampled it.

What is the all-time peak player count of Mars Underground?

0 concurrent players on 10 Sep 2026.

Mars Underground was released on Steam on 14 Mar 2019.

GameApp ID 578,420by Matt SandersonReleased 14 Mar 2019

App ID578,420

Release date14 Mar 2019

Engine—

Install size1.10 GB

TypeGame

Last update26 Mar 2019

Steam Deck—

DLC1

DeveloperMatt Sanderson

Changenumber37,436,216

Price—

Packages0

PublisherMatt Sanderson

SystemsWindows · Linux

Followers—

Depots5

Mars Underground

Steam user reviews

Very Positive

96.4%· 56 reviews

Recent —

SteamPeaks Rating

81.1 Positive

Recent 30 days —

Last seen

Sampled 5 hours ago · not a live figure

—of peak

All-time peak

10 Sep 2026

Steam Cloud

95.4 MB quota · 100 files

Key	Value
quota	100000000
savefiles.0.path	www/save
savefiles.0.root	gameinstall
savefiles.0.pattern	.
savefiles.0.platforms.1	Windows
savefiles.1.path	www/save
savefiles.1.root	gameinstall
savefiles.1.pattern	.
savefiles.1.platforms.1	Linux
savefiles.2.path	Mars Underground/Contents/Resources/app.nw/save
savefiles.2.root	gameinstall
savefiles.2.pattern	.
savefiles.2.platforms.1	MacOS

Mars Underground Cloud Saves · SteamPeaks