Steam App 578420
Mars Underground
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.
External stores
Marketplace offers
External marketplace offers may be affiliate links. Verify the product type and activation region before purchasing.
KINGUINMars Underground Steam CD KeyChikiligamesUpdated: 2026-07-29 08:13
≈ $ 0.59Region free11 available
View offerKINGUINMars Underground Steam CD KeyDigital Distribution HubUpdated: 2026-07-29 08:13
≈ $ 1.58Region free3 available
View offerAbout
If you like this game look up "Spooky Crew: Mask of the Mysterium" also on Steam. I have a demo out and I'm working really hard on it!
It's your first day at a new school. Every day is your first day at a new school. Every night the world ends.
Mars Underground is an apocalyptic adventure game where you relive the same day over and over. With each cycle new items can be picked up and topics unlocked.
Take experimental prescription drugs. Talk to a toilet. Get hit by a car. Humiliate yourself repeatedly. All in the name of figuring out what on earth is going on.
It's your first day at a new school. Every day is your first day at a new school. Every night the world ends.
Mars Underground is an apocalyptic adventure game where you relive the same day over and over. With each cycle new items can be picked up and topics unlocked.
Take experimental prescription drugs. Talk to a toilet. Get hit by a car. Humiliate yourself repeatedly. All in the name of figuring out what on earth is going on.
- Solve brain damaging mysteries.
- Discover all the potential endings.
- Find new stuff every cycle.
- Talk, interact, annoy and generally bother the denizens of Phobos City as they try to go about their day.
- All original, "dynamic" music soundtrack.
- Can be fully played with either a keyboard, a controller or touch input.
Regional data
Prices
| Country | Currency | Initial | Final | Discount | Updated |
|---|---|---|---|---|---|
| United States | - | - | Free | 0% | 2026-07-24 15:35 |
| Poland | - | - | Free | 0% | 2026-07-24 15:35 |
| Germany | - | - | Free | 0% | 2026-07-24 15:35 |
| France | - | - | Free | 0% | 2026-07-24 15:35 |
| United Kingdom | - | - | Free | 0% | 2026-07-24 15:35 |
| Czech Republic | - | - | Free | 0% | 2026-07-24 15:35 |
| Slovakia | - | - | Free | 0% | 2026-07-24 15:35 |
| Ukraine | - | - | Free | 0% | 2026-07-24 15:35 |
| Turkey | - | - | Free | 0% | 2026-07-24 15:36 |
| Brazil | - | - | Free | 0% | 2026-07-24 15:36 |
| Argentina | - | - | Free | 0% | 2026-07-24 15:36 |
| Mexico | - | - | Free | 0% | 2026-07-24 15:36 |
| Canada | - | - | Free | 0% | 2026-07-24 15:36 |
| Australia | - | - | Free | 0% | 2026-07-24 15:36 |
| Japan | - | - | Free | 0% | 2026-07-24 15:36 |
| South Korea | - | - | Free | 0% | 2026-07-24 15:36 |
| China | - | - | Free | 0% | 2026-07-24 15:36 |
| India | - | - | Free | 0% | 2026-07-24 15:36 |
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Frequently asked questions
How much does Mars Underground cost?
Mars Underground is currently listed as: Free. Prices may vary by region and store.
Which platforms does Mars Underground support?
Mars Underground supports: windows, linux.
Who developed and published Mars Underground?
Mars Underground was developed by Matt Sanderson and published by Matt Sanderson.
Are external marketplace offers available for Mars Underground?
Yes. There are 2 marketplace offers for Mars Underground; the lowest cached offer starts from ≈ $ 0.59.