Mars Underground
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About Mars Underground
Mars Underground is an apocalyptic adventure game in which you relive the same day at a new school. Each night, the world ends. With every cycle, you can pick up new items and unlock new topics as you work out what is happening.
Explore Phobos City
Talk to, interact with and bother the residents of Phobos City as they go about their day. You can take experimental prescription drugs, talk to a toilet, get hit by a car and repeatedly humiliate yourself while investigating the mysteries.
Mysteries and endings
Solve the mysteries and discover the potential endings. New things become available to find with each cycle, and the game features an original dynamic music soundtrack.
Frequently asked questions
Yes. Mars Underground is free to play on Steam, so there is nothing to buy to start playing.
The minimum requirements for Mars Underground are: Windows 7, Intel Core 2 Duo, 4 GB RAM, 300 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Mars Underground is a single-player game.
Mostly, yes. Valve rates Mars Underground as Playable on the Steam Deck: it runs, but may need some manual setup.
Yes. Mars Underground is the full base game. You need nothing else to play it.











