Full list of all 59 Mars Horizon achievements worth 1,000 gamerscore.
All achievements
Achievements they've won
Achievements they've not won
Complete every other Mars Horizon achievement
Win the Race to Mars on very hard difficulty
Win the Race to Mars on hard difficulty or above
Launch a vehicle with a 1% chance of Critical Failure... which explodes
Finish 1st in every Milestone mission in a single game on normal difficulty or above
Win the Race to Mars with all 5 space agencies
Complete a mission using an astronaut above the age of 70
Complete a Joint mission with an Antagonistic agency
Succeed a launch using an N1 booster
Explode a Sounding Rocket
Complete every Milestone mission in a single game
Land humans on Mars in a Joint mission with another agency
Become Allied with all other agencies
Complete a mission with a Payload that has 50% or lower Payload Reliability
Complete Human in Space, Orbital EVA, Multicrew Orbit, Crewed Moon Landing with the same astronaut
Complete a Publicised Request Mission using a Celebrity astronaut
Complete the Grand Tour
Complete all 4 Mars Preparation missions
Complete every Research in every Research Tree in a single game
Complete every Research in the Vehicles Tree
Complete every Research in the Buildings Tree
Complete a mission task with 30 or more Thrust
Complete every Research in the Missions Tree
Complete a mission task with 1% Payload Reliability at the end of it
Remove every obstruction from your base
Complete a mission task with 50 or more Data
Complete a Modular Space Station
Launch a mission using a reusable spaceplane
Land on the Moon before any other space agency
Complete the Crewed Moon Landing mission before July, 1969
Launch a crewed moon mission using a Saturn V booster
Have a single building with 6 active Positive Adjacency effects
Launch a human into Earth orbit before April, 1961
Win the Race to Mars
Land humans on Mars
Complete a mission task with 50 or more Comms
Unlock an Era Completion reward in a Research Tree
Complete a mission with a Payload that has 99% Payload Reliability
Hire a Tier 3 astronaut
Land an Exploratory Rover on Mars
Send an astronaut on a mission one month before their retirement
Launch a Space Telescope into orbit
Complete a mission to any of the Outer Planets
Successfully launch a vehicle in Terrible conditions
Construct a small, medium, and large launchpad
Complete an Orbital EVA
Complete a mission task that requires Drift to be exactly 0
Complete the Bonus Objective of a mission task that involves Heat
Complete a Joint Mission
Complete every Bonus Objective on a mission with at least 3 tasks
Complete a mission to any of the Inner Planets, excluding Earth
Launch any vehicle except Sounding Rocket with 99% Launch Reliability
Launch any vehicle except Sounding Rocket with 50% or lower Launch Reliability
Launch an animal into Earth orbit
Reach the maximum Experience Level for a vehicle part
Complete a Challenging Request Mission
Achieve a mission task's Bonus Objective with the last Command of the last turn
Place an Artificial Satellite in orbit
Complete the Bonus Objective of a mission task