Mars Horizon

75KS71Metacritic
Released Nov 17, 2020by Auroch DigitalVery Positive(84% of 3.1K Steam reviews)Recent: 82% positive

Lead a major space agency as you guide humanity to Mars in this strategy simulation game. Construct a base, design and build rockets, conduct missions throughout the Solar System, and write your own history of Space exploration. Created with support from the European Space Agency.

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Official stores

Official stores with direct support.

Steam
SteamOfficial
updated
$19.99
-70%$5.99
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Keyshops

Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →

K4G
K4GKeyshop
updated
Lowest price
-79% vs Steam$4.29
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Eneba
EnebaKeyshop
updated
-78% vs Steam$4.36
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Gamivo
GamivoKeyshop
updated
-77% vs Steam$4.60
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Instant Gaming
Instant GamingKeyshop
updated
$20.52
-75% vs Steam$5.01
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GameBoost
GameBoostKeyshop
updated
-74% vs Steam$5.12
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Demo (1)

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Multipacks (1)

DLCs (1)

About Mars Horizon

In Mars Horizon, you take control of a major space agency, leading it from the dawn of the space age through to landing astronauts on Mars. Guide your agency through the space race and write your alternate history of space travel - any of the agencies can be the first to land on The Moon if you make the right choices. Manage the numerous challenges faced then and now:

  • Create your own space agency and base with launch pads, research labs, astronaut training facilities, and much more

  • Construct custom vehicles from hundreds of combinations

  • Launch satellites and crewed spacecraft to explore the Solar System

  • Run mission control as you solve the various challenges of turn-based missions to earn scientific advancement and public support

  • Recreate famous missions conducted by NASA, ESA and CNSA - including the Perseverance Rover, Ingenuity Helicopter, Zhurong Rover and Rosetta space probe missions.

  • Explore an extensive tech tree and compete or collaborate with other agencies to plot your roadmap to Mars

  • Choose from five unique space agencies, each with their own traits, base, vehicles, and spacecraft

  • Build with unlimited freedom in a fully-customisable Sandbox Mode

You’re in charge of every element of the journey into space: success rides on your decisions.

Will you push to stay ahead of the other agencies, or focus on testing and research? There are multiple ways to ensure the first person on Mars is under your command. Every choice matters: will you invest in the most advanced technology or take risks in the rush to the red planet?

Using actual events and missions as inspiration, can you handle the challenges faced by real space agencies?

Management is a vital aspect of Mars Horizon. You'll need to design and build the right spacecraft, hire and train the crew, and make strategic decisions as mission control to survive the journey to Mars.

Enter into diplomatic partnerships with other agencies to share the rewards of space exploration, or risk going it alone to gain greater prestige. Construct the ideal rocket from historically-inspired vehicle parts. Hire contractors to construct vehicles and use their unique benefits to gain a key edge over your competitors.

Launching a payload into space is only the first step. In assuming the role of Flight Director of mission control, you'll need to manage your spacecraft's resources and solve strategic challenges in turn-based missions in order to succeed. But beware: space is a very unforgiving environment.

These are the critical moment-to-moment decisions of mission control; do you spend power to fix a malfunctioning antenna or save it in case of an oxygen leak? Perhaps risking that extra three months of mission planning could have avoided this issue?

Mars Horizon has been made with the input and support of the European Space Agency (ESA) and the UK Space Agency.

We’ve collaborated with numerous experts in space exploration from the ESA in creating Mars Horizon. From engineers developing the technology used in Mars programmes, to those designing the next generation of missions, bringing an unprecedented level of authenticity, realism and legitimacy to the gameplay and its scenarios.

Dig deeper into the game via our podcast, including discussions with staff from the European Space Agency and UK Space Agency. Check out the podcast in the Steam forums or the main site.

Game details

Mars Horizon price history

Lowest tracked price: $4.28 (Jul 13, 2026) · current best: $4.29 across 6 stores.

Mars Horizon player count & reviews

84% positive reviews all-time · 37 peak players in the last 30 days.

Mars Horizon — frequently asked questions

Where can I buy Mars Horizon at the cheapest price?

Right now the cheapest offer for Mars Horizon is $4.29 at K4G. KingsPrice compares 6 offers from 6 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price Mars Horizon has ever been?

The lowest price KingsPrice has tracked for Mars Horizon is $4.28 (recorded on Jul 13, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.

How many people play Mars Horizon?

Mars Horizon peaked at 37 concurrent players on Steam in the last 30 days (highest on Jul 21, 2026). The player chart on this page updates daily.

Is it safe to buy a Mars Horizon Steam key from a keyshop?

Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →

How can I get Mars Horizon at a discount?

Create a free price alert on this page and KingsPrice will email you when Mars Horizon drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.

System requirements

Minimum

Minimum:
  • OS *: Windows 7 / 8 / 10
  • Processor: 2.0GHz Dual Core Processor
  • Memory: 4 GB RAM
  • Graphics: GeForce GT 740 (2048 MB) / Radeon HD 5770 (1024 MB) or equivalent
  • DirectX: Version 11
  • Storage: 4 GB available space
  • Sound Card: DirectX compatible

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