Mars Underground overview

Matt Sanderson | Mar 14, 2019 | game

Released

0players observed · 13 September 2026 - 08:37:15 UTC

Adventure Indie Free To Play Free to Play 2D Steam Store

Latest observed playersNot available
SteamPulse tracked peak2
Units sold (VGI)1,574
Revenue (VGI)$6,984
Review score96% positive

Mars Underground dated player observations, monthly player trends, reviews, and game metadata are tracked on SteamPulse.

Latest observed playersNot available
SteamPulse tracked peak2
Units sold (VGI)1,574
Revenue (VGI)$6,984
Review score96% positive
Total reviews56
Release dateMar 14, 2019
DeveloperMatt Sanderson
PublisherMatt Sanderson

Genres: Adventure, Indie, Free To Play

Company pages: Developer: Matt Sanderson Publisher: Matt Sanderson

Top Steam charts Top 100 games Game directory Steam Store page

Game overview

Overview

Mars Underground comes from Matt Sanderson and is published by Matt Sanderson. It arrived on Steam on Mar 14, 2019, and it sits naturally among Single-player, Steam Achievements, Full controller support, Steam Cloud, Remote Play Together, and Family Sharing. SteamPulse tracks it across Windows, Linux, and Steam so readers get a quick useful snapshot, not just a wall of numbers.

Players and reviews

Mars Underground's latest SteamPulse observation recorded 0 players at 13 September 2026 - 08:37:15 UTC, with a tracked peak near 2. This peak is the highest value in the available SteamPulse record and may not include activity before tracking began. Player reaction is 96% positive across 56 reviews.

Language and system requirements

Mars Underground is available in 1 languages including:

English

regional rating details listed by Steam when available

Platform	Type	OS	Processor	Memory	Graphics	Storage
Windows	Minimum	Not listed	Intel Core2 Duo or better.	4 GB RAM	DirectX 9/OpenGL 4.1 capable GPU.	300 MB available space
macOS	Minimum	Mac OSX 10.10 or better	Intel Core2 Duo or better	4 GB RAM	Compatible OpenGLR	250 MB available space
Linux	Minimum	Ubuntu 14.04 or Steam OS 2.0 (64 bit)	Intel Core2 Duo or better	4 GB RAM	Not listed	300 MB available space

Sales, recommendations, and streams

Mars Underground has sold up to 1,574 units and has recommendation data pending. The estimated VGI revenue is $6,984. On Twitch, 0 streamers are live with around 0 total watchers.

Detailed game overview

Mars Underground overview details

Mars Underground combines live player counts with reviews, pricing, platform support, Store metadata, dated player history, media, recent news, and related games.

Steam Store description

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.

SteamPulse editorial summary

Mars Underground is listed as a game with Free to play. It supports Windows and Linux, belongs to Single-player, Steam Achievements, Full controller support, Steam Cloud, Remote Play Together, and Family Sharing, and is associated with Adventure, Indie, and Free To Play. SteamPulse's latest observation records 0 players at 13 September 2026 - 08:37:15 UTC, a tracked peak of 2, and 96% positive reviews.

Overview facts

Field	Value
Game	Mars Underground
Steam App ID	578420
Type	game
Release date	Mar 14, 2019
Developer	Matt Sanderson
Publisher	Matt Sanderson
Price	Free to play
Platforms	Windows and Linux
Genres	Adventure, Indie, Free To Play
Categories	Single-player, Steam Achievements, Full controller support, Steam Cloud, Remote Play Together, Family Sharing
Supported languages	English
Website	Official website

Player and review overview

Metric	Value
Latest observed players	0 · 13 September 2026 - 08:37:15 UTC
SteamPulse tracked peak	2
Positive reviews	54
Negative reviews	2
Total reviews	56
Positive percent	96%
Review type	Very Positive
Recommendations	Not available
Average playtime	Not available

SteamPulse record freshness

Field	Value
Steam release date	Mar 14, 2019
Official Steam feed update (UTC)	23 August 2024 - 03:02:22 UTC
SteamPulse last record update (UTC)	13 September 2026 - 08:37:15 UTC
Live player count updated (UTC)	13 September 2026 - 08:37:15 UTC
Store metadata updated (UTC)	13 September 2026 - 08:37:15 UTC

Overview tags

Adventure Indie Free to Play 2D Pixel Graphics Story Rich Retro Time Manipulation Interactive Fiction Nonlinear RPGMaker

Highlighted achievements

Achievement	Description
Driver	No description
Flushed	No description
Brown Rocks	No description
At Least You Tried	No description
Hey!	No description
Don't Mess With My TV	No description
Another Satisfied Meaty Bites Customer	No description
Expelled	No description
You Made the News	No description
Sigh	No description

Support and legal notes

Field	Value
Support email	[email protected]
Support URL	Support page
Legal notice	Not available

References

Official and third-party reference links for checking this Steam app outside SteamPulse.

Reference	Link
SteamPulse canonical	https://steampulse.org/game/578420
Steam Store	https://store.steampowered.com/app/578420/
Steam Community	https://steamcommunity.com/app/578420
PCGamingWiki search
IGDB search	Search IGDB for Mars Underground

Game FAQ

Real questions answered from SteamPulse data, including live players, monthly momentum, review sentiment, regional audience signals, Twitch activity, and current Steam pricing.

What is the latest observed Steam activity for Mars Underground?

Mars Underground's latest SteamPulse observation records 0 players at 13 September 2026 - 08:37:15 UTC, with a tracked peak of 2 concurrent players in the available SteamPulse record. The tracked peak is the highest value stored by SteamPulse and may not cover activity from before tracking began.

Is Mars Underground growing or declining recently?

September 2026 is still in progress. The month-to-date average is 0 players; the highest observed daily value is 1 players. Available values are provisional and will continue changing until the UTC month closes. The completed comparison month is August 2026.

What country-level audience data is available for Mars Underground?

In the observed sample of public reviewer profiles with a visible country, the leading shares are Poland (17.6%), United States (11.8%), Australia (11.8%). The separate directional player-region model assigns its leading shares to United States (14.6%), Poland (12.8%), Canada (9.2%). The directional follower-region model assigns its leading shares to United States (16%), Poland (14.3%), Canada (9.7%). The directional wishlist-region model assigns its leading shares to United States (14.7%), Poland (10.8%), Canada (7.9%). Only the reviewer view is based on observed public profile countries; the other percentages are modeled relative weights, not verified account locations or country-level user counts.

What does the Steam review footprint look like for Mars Underground?

Mars Underground currently sits at 96% positive across 56 Steam reviews tracked by SteamPulse, including 54 positive reviews and 2 negative reviews. Steam labels the current review summary as Very Positive.

How much follower and Twitch attention does Mars Underground have?

Mars Underground currently has about 274 tracked Steam followers as of 11 January 2026 - 00:00:00 UTC. On Twitch, SteamPulse is matching roughly 0 live viewers across 0 active streams for the game's category.

What is the current Steam price for Mars Underground?

Mars Underground is currently listed as free to play on Steam, so there is no paid entry price to compare against an older baseline. SteamPulse still keeps tracking store state, discount fields, and future pricing changes in case that status changes later.

Reviews, pricing, and metadata

Review summary

Very Positive

96% positive, 54 positive, 2 negative

Price and discount

Free to play

Platforms

Windows, Linux

Categories

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

Achievements

Platform releases

Steam 14 March 2019

DLC and packages

Mars Underground SoundtrackSoundtrack for Mars Underground.dlc #1046260$1.99

System requirements

Minimum requirements

Minimum: OS *: Microsoft® Windows® 7/8/8.1/10 (32bit/64bit) Processor: Intel Core2 Duo or better. Memory: 4 GB RAM Graphics: DirectX 9/OpenGL 4.1 capable GPU. DirectX: Version 9.0 Storage: 300 MB available space

Interactive charts, reviews, news, prices, and comparison tools load in the full SteamPulse app.