# Mars Underground

Summer DB entity ID: 65a081ab\-c08f\-45ac\-9b68\-88b94f5e615e

Steam App ID: 578420

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\.    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\.

## Game information

- Type: game

- Developer: Matt Sanderson

- Publisher: Matt Sanderson

- Release date: Mar 14, 2019

- Coming soon: false

- Free to play: true

- Parent Steam app: Not collected

- Genres: Adventure, Indie, Free To Play

- Categories: Single\-player, Steam Achievements, Full controller support, Steam Cloud, Remote Play Together, Family Sharing

- Platforms: windows, linux

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_ea40700b7887914cbdea0ceeb2a6c0fdcc226c36\.1920x1080\.jpg?t=1724731890, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_85342e7bd4faada8923b36e24b4ed4cb6c66904f\.1920x1080\.jpg?t=1724731890, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_9b7c3c54e81d3e09dfc11ee5e7ab7fbef86cfd9a\.1920x1080\.jpg?t=1724731890, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_56aaadddc70c0c1550a0dd48f98ce6e7015bd9ce\.1920x1080\.jpg?t=1724731890, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_a9d29f2cfd16b73f48d0983855cb9faf0f7d7720\.1920x1080\.jpg?t=1724731890, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/578420/ss\_27d68a9882a06bdd46147fa8b2103e985ee58983\.1920x1080\.jpg?t=1724731890

- Price: Not collected

- Price country: Not collected

## Observed metrics

- Current players: 0

- Steam review count: 56

- Steam positive reviews: 54

- Steam negative reviews: 2

- Steam positive percentage: 96.42857142857143%

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/65a081ab-c08f-45ac-9b68-88b94f5e615e/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/65a081ab-c08f-45ac-9b68-88b94f5e615e/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00

- Details observed: 2026\-09\-22T18:05:31\.927187\+00:00

- Player count observed: 2026\-09\-22T18:05:34\.29436\+00:00

- Reviews observed: 2026\-09\-22T18:05:32\.908368\+00:00

Full provenance: \{"urls":\{"price":null,"catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/578420/","players":"https://api\.steampowered\.com/ISteamUserStats/GetNumberOfCurrentPlayers/v1/?appid=578420","reviews":"https://store\.steampowered\.com/appreviews/578420"\},"price":null,"source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-22T18:05:31\.927187\+00:00","players":"2026\-09\-22T18:05:34\.29436\+00:00","reviews":"2026\-09\-22T18:05:32\.908368\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":null,"catalog":"bb70899f\-49d9\-415b\-8983\-4f2c019846f7","details":"362d1b02\-f1e5\-41c4\-bb8f\-b96d08a03ffb","players":"d2658928\-cbfd\-457f\-b3ad\-0744d96f6121","reviews":"d6206d06\-7a24\-4a49\-9c7f\-ffb49213232d"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"65a081ab\-c08f\-45ac\-9b68\-88b94f5e615e","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/578420/) · [JSON](/api/v1/games/65a081ab-c08f-45ac-9b68-88b94f5e615e)