Mars Underground

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Mars Underground is an apocalyptic adventure where you relive the same day over and over. With each cycle new items can be picked up and topics unlocked. Explore the possibilities of this timeloop and uncover multiple endings.

Developer: Matt Sanderson
Released: 14 Mar 2019
Price: Free to play
Platforms
Steam Deck: Playable
Languages: English
Controller: Full

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Players on Steam, last 48 hours

No player readings for Mars Underground in the last 48 hours yet. We poll this game every 30 days.

How this is measured

Player counts over time, as we observed them.

Counts people running the game through Steam only. Players on other stores, consoles or launchers are not included.
We poll the busiest games every 15 minutes and quiet ones as rarely as once a month, so a short spike between polls can be missed. Each game shows how often it is polled.
Our player history starts on 19 October 2026. Earlier peaks, including launch peaks, are not in our data.

Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology

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Mars Underground

Players on Steam, last 48 hours

Players on Steam, last 48 hours

Players By Month

Mars Underground

Players By Month