Full list of all 50 Citizens of Space achievements worth 1,000 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Xbox One.
Beat the game with all citizens recruited
Defeat GalactiCo within the Corporate Dimension
Complete all Extermination quests
Use 150 items
Complete all Hide-And-Seek quests
Complete all Wanted Poster quests
Stop the GalactiFactory before it totally recalls Earth
Foil the President's convoluted plot against his own planet
Receive 10,000 damage in combat
Discover the records of GalactiCo's acquisition of Earth
Collect 1,000 shiny bits
Recover the pieces of Earth noted in the President's intel
Use 75 items
Defeat 1,000 enemies
Get all citizens to Talent Lv 3
Swap Citizens in battle 100 times
Recruit all 40 citizens
Implement a policy in battle 20 times
Find 100 treasures
Recruit 25 citizens
Spend $10,000
Complete 25 bounty missions for the Sheriff
Summon a citizen in battle 50 times
Get one citizen to Lv 20
Use 25 items
Return Earth's core to its proper place
Receive 2,500 damage in combat
Earn $10,000
Defeat 250 enemies
Rescue the Astronomer from her lunar bunker
Find 45 treasures
Get one citizen to Talent Lv 3
Discover 30 locations
Collect 300 items
Receive 500 damage in combat
Spend $3,000
Spend $1,000
Earn $3,000
Deal 10,000 damage in combat
Defeat 50 enemies
Recruit 5 citizens
Earn $1,000
Discover 20 locations
Find 15 treasures
Leave the Galactic Federation of Planets to find the Earth!
Collect 100 items
Deal 2,500 damage in combat
Deal 500 damage in combat
Discover 10 locations
Collect 30 items