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.
| App ID | 578420 |
|---|---|
| App type | Game |
| Developer | Matt Sanderson |
| Publisher | Matt Sanderson |
| Homepage | https://store.steampowered.com/app/2463610/Spooky_Crew_Mask_of_the_Mysterium/ |
| Release date | 2019-03-14 22:45 UTC |
| Release state | released |
| Controller support | full |
| Free app | Yes |
| DLC list (appinfo) | 1046260 |
| Store page | store.steampowered.com/app/578420 |
| Last store refresh | 5 hours ago |
| # | Executable | Arguments | OS | Description |
|---|---|---|---|---|
| 0 | mars.exe | windows | ||
| 1 | nw | linux | ||
| 2 | Mars Underground.app | macos |
No player history yet. This app is now tracked, so data will appear within about ten minutes.
| Playing now | Not polled yet (never) |
|---|---|
| 24-hour peak | |
| All-time peak (tracked) |
All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.
Loading regional prices…
| Date | Price | Regular | Discount |
|---|---|---|---|
| 2026-09-11 22:12 UTC | Free | Free |
| DLC | AppID | Release | Price |
|---|---|---|---|
| No DLC known for this app. | |||
| Branch | Build ID | Description | Updated | Password |
|---|---|---|---|---|
| public | 3680743 | 2019-03-26 12:04 UTC |
| Depot | Name | OS | Size | Download | Public manifest | Notes |
|---|---|---|---|---|---|---|
| 578421 | windows · english | 301.50 MB | 159.99 MB | 6833095704805439195 | ||
| 578422 | english | |||||
| 578423 | macos · 64 · english | 341.33 MB | 168.66 MB | 8435523894066683751 | ||
| 578424 | linux · 64 · english | 332.88 MB | 158.41 MB | 2807835595288199415 | ||
| 1046260 | 145.65 MB | 144.08 MB | 8482199040625270292 | DLC 1046260 |
A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.
| Build ID | Branch | Updated | First seen |
|---|---|---|---|
| 3680743 | public | 2019-03-26 12:04 UTC | 5 hours ago |
Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since 2026-09-11 22:12 UTC.
No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.
| Changelist | Apps | Packages | Seen | What changed |
|---|---|---|---|---|
| No changelists recorded for this app yet. | ||||
Mars Underground is now 100% free! Tell your family! Tell your friends! Tell your enemies! Thanks so much to everyone who has supported the game over the years!
Mars Underground is changing from paid to free! We have a new game well under development: {STEAM_CLAN_IMAGE}/33672109/d2545dfc9e2f79a14449e47ce0f09fc486ddbd0b.png Spooky Crew: Mask of the Mysterium Spooky Crew: Mask of the Mysterium Join the Spooky Crew and uncover the secret of the Mask of the Mysterium in this point and click adventure game. An encounter with a masked figure leads the crew to investigate a local museum. Classic adventure gameplay that isn’t stuck in the nostalgic past. While under the influence of recent games like Baldur's Gate 3 new twists, like different ways to approach
Moloch Media's game "Shadows and Dust" is now free forever! A short narrative experience that combines sections of first person exploration with text based interactive dialogue scenes. Accompanied by a meticulously crafted soundtrack powered by Wwise. A dim view. A dark room. Someone else is here. These are my real nightmares. Shadows and Dust is a short ghost story about regret. A horror game about real horror. Anxiety and depression. Suicide. Choices that can't be taken back. http://store.steampowered.com/app/1138130/
Very proud to announce that Mars Underground is a finalist in 3 different award categories at Freeplay: Excellence in Design Excellence in Audio Excellence in Narrative Freeplay 2019 Awards Finalists
First reviews for Mars Underground are in and they've all been very positive so far! "The bizarre town of Phobos is a joy to explore, with many places to go and quirky residents to meet. ... Complimenting the unsettling atmosphere of the town is the astounding sound track: a discordant experimental blend of chiptunes and crunchy EDM sampling. ... This point-and-click adventure without the pointing and clicking features masterful puzzle design, beautiful presentation, and a cast of colourful characters. Mars Underground is simply a joy to play." OnlySP (4/5 - Distinction) "Each character is gre
Patch 1.01 Notes This patch mainly addresses issues the community have raised. Fixes: -Potential crash at Moloch Media -Police not visible in police station at early night -Robe dissapearing in CPA room -Made some achievements easier to get -Fixed several graphic glitches -Slowed down some stuff post game
I don't know about you, but I still have nightmarish dreams about my first day at school. In hindsight, it's not exactly the toughest thing one does in life, but neither is going to the dentist and that sucks too. What if no one likes you? What if the bully doesn't like your face? What if you spill tomato sauce down your crisped school uniform? What if the world ends?  Mars Underground is a top down, 16-bit styled adventure game about one's first day at school. But in a twist reminiscent of Majora's Mask, or Groundhog Day, it's your first day at school every
Full appinfo as delivered by Steam PICS, changenumber 37436216. Also at /api/app/578420/raw.
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