Here is the full list of all 64 Out There: O Edition achievements.
You have gathered the interstellar alliance
You met with 30 alien races.
Find a way back home
Know all alien races
Rule the Enemy
Build a telescope and its 2 upgrades
Purge a star system ruled by the Enemy
Build all Space Folder upgrades
Jettison a human
Talk with 15 alien races
Build the Ansible
Terraform a planet
Learn all the alien words
Scan a planet
Board a huge ship
Save your kind
Encounter 10 alien races
Have the nostalgia of hamburgers.
Reach the Iron Star Station
Reach the very last star
Build a Death Seed
Find the cathedral
Find the Crescent ship
Have your oxygen below 5%
Use the Synergy
Board a weird ship
Risk everything and live to tell
Meet the Enemy
Find an Artifact
Set your ship at 100% resistance
Build a Space Folder
Fix something with Omega
Break your drill
Have your hull below 5%
Meet the Judge Architect
Meet 5 alien races
Receive a SOS
What a huge ship !
Rule 140 star systems !
Travel through a black hole
Map 120 star systems
Find a yellow ship
Board a new ship
Board a strange ship
Probe a star for fuel
Learn how to say "Love" in alien
Set your ship at 100% efficiency
Set your ship at 100% ecosystem
Discover 80 star systems
Receive a special call
Bring back an alien on its homeworld
Dismantle your space folder
Have an equipement destroyed
Receive some Omega
Orbit a black hole !
Approach a Black Hole
Have your fuel below 5%
Meet an Alien
Board a space station
Orbit a Star
Visit 30 star systems
Explore 10 star systems
Dig some gold !
Drill an inhabited planet