PC

Mars Horizon Steam Key

Mars Horizon

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.

Windows PC  Simulation / Strategy

65 Steam Achievements

Space Age
Space Age

Place an Artificial Satellite in orbit

Ahead of the Curve
Ahead of the Curve

Place an Artificial Satellite in orbit before October, 1957

Laika Hero
Laika Hero

Launch an animal into Earth orbit

Space Pioneer
Space Pioneer

Launch a human into Earth orbit

Test Pilot
Test Pilot

Launch a human into Earth orbit before April, 1961

One Small Step
One Small Step

Complete the Crewed Moon Landing mission

One Giant Leap
One Giant Leap

Complete the Crewed Moon Landing mission before July, 1969

Moon Shot
Moon Shot

Land on the Moon before any other space agency

Outer Planet Explorer
Outer Planet Explorer

Complete a mission to any of the Outer Planets

Inner Planet Explorer
Inner Planet Explorer

Complete a mission to any of the Inner Planets, excluding Earth

Neighbourly
Neighbourly

Complete missions to every planet in the Solar System in a single game

Spacewalk
Spacewalk

Complete an Orbital EVA

Not So Minor
Not So Minor

Complete a flyby of Pluto

Stellar Work
Stellar Work

Launch a Space Telescope into orbit

Tour Guide
Tour Guide

Complete the Grand Tour

Red Rover
Red Rover

Land an Exploratory Rover on Mars

Eighth Wonder
Eighth Wonder

Complete a Modular Space Station

Solar Systematic
Solar Systematic

Complete every Milestone mission in a single game

First!
First!

Finish 1st in every Milestone mission in a single game on normal difficulty or above

Life on Mars
Life on Mars

Land humans on Mars

Prepared
Prepared

Complete all 4 Mars Preparation missions

Multiplanetary Partners
Multiplanetary Partners

Land humans on Mars in a Joint mission with another agency

SCE to AUX
SCE to AUX

Successfully launch a vehicle in Terrible conditions

Needs More Engines
Needs More Engines

Succeed a launch using an N1 booster

Critical Knowledge
Critical Knowledge

Explode a Sounding Rocket

Nothing Can Possibly -
Nothing Can Possibly -

Launch a vehicle with a 1% chance of Critical Failure... which explodes

Rocket Recycling
Rocket Recycling

Launch a mission using a reusable spaceplane

Boosted
Boosted

Launch any vehicle except Sounding Rocket with 99% Launch Reliability

Project Apollo
Project Apollo

Launch a crewed moon mission using a Saturn V booster

Screw Loose
Screw Loose

Launch any vehicle except Sounding Rocket with 50% or lower Launch Reliability

Vehicle Veteran
Vehicle Veteran

Reach the maximum Experience Level for a vehicle part

Is It Meant to Make That Noise?
Is It Meant to Make That Noise?

Complete a mission with a Payload that has 50% or lower Payload Reliability

Victory Assured
Victory Assured

Complete a mission with a Payload that has 99% Payload Reliability

Polymath
Polymath

Complete every Research in every Research Tree in a single game

Rocket Science
Rocket Science

Complete every Research in the Vehicles Tree

Grand Designs
Grand Designs

Complete every Research in the Buildings Tree

Missions Architect
Missions Architect

Complete every Research in the Missions Tree

Era Clearer
Era Clearer

Unlock an Era Completion reward in a Research Tree

Challenge Accepted
Challenge Accepted

Complete a Challenging Request Mission

Shared Space
Shared Space

Complete a Joint Mission

This Doesn't Make Us Friends
This Doesn't Make Us Friends

Complete a Joint mission with an Antagonistic agency

Publicity Campaign
Publicity Campaign

Complete a Publicised Request Mission using a Celebrity astronaut

Still Got It
Still Got It

Complete a mission using an astronaut above the age of 70

One Last Job
One Last Job

Send an astronaut on a mission one month before their retirement

Tour of Duty
Tour of Duty

Complete Human in Space, Orbital EVA, Mulitcrew Orbit, and Crewed Moon Landing using the same astronaut

Best of the Best
Best of the Best

Hire a Tier 3 astronaut

For Space
For Space

Remove every obstruction from your base

Launch Capable
Launch Capable

Construct a small, medium, and large launchpad

Surrounded by Positivity
Surrounded by Positivity

Have a single building with 6 active Positive Adjacency effects

Space Federation
Space Federation

Become Allied with all other agencies

Parameters Exceeded
Parameters Exceeded

Complete the Bonus Objective of a mission task

Mission Controlled
Mission Controlled

Complete every Bonus Objective on a mission with at least 3 tasks

Never in Doubt
Never in Doubt

Achieve a mission task's Bonus Objective with the last Command of the last turn

Delta-victorious
Delta-victorious

Complete a mission task with 30 or more Thrust

Inundata
Inundata

Complete a mission task with 50 or more Data

Loud and Clear
Loud and Clear

Complete a mission task with 50 or more Comms

Thermal Control
Thermal Control

Complete the Bonus Objective of a mission task that involves Heat

Payload Precision
Payload Precision

Complete a mission task that requires Drift to be exactly 0

Irradiated
Irradiated

Complete a mission task with 1% Payload Reliability at the end of it

Space Academy
Space Academy

Complete all Tutorial Objectives

Multiplanetary Species
Multiplanetary Species

Win the Race to Mars

Space is Hard
Space is Hard

Win the Race to Mars on hard difficulty or above

Space is Very Hard
Space is Very Hard

Win the Race to Mars on very hard difficulty

Well Done, Director
Well Done, Director

Win the Race to Mars with all 5 space agencies

Mars Horizon
Mars Horizon

Complete every other Mars Horizon achievement

  • Single-Player
  • Steam Achievements
  • Steam Trading Cards
  • Partial Controller Support
  • Steam Cloud
We take you straight to the front lines of Cold War

We take you straight to the
front lines of Cold War