Here is the full list of all 31 OPUS: The Day We Found Earth achievements.
Scan a star in Dark Section [三]
Scan 10 Lisa-found exoplanet
Complete All sub missions
Complete all Zone5 main missions
Complete all Zone4 main missions
Complete all Zone3 main missions
Scan 10 planets in the LISA Solar System
Scan 100 stars
Complete 6 sub missions
Scan 5 stars with non-exoplanets in a row
Scan 2 stars with non-exoplanets in a row
Complete all Zone2 main missions
Scan 5 Lisa-found exoplanet
Scan 5 stars with no planets in a row
Scan 5 planets in the LISA Solar System
Inspect 20 items in the spaceship
Scan 20 stars
Complete 3 sub missions
Scan 1 Lisa-found exoplanet
Complete 1 sub mission
Inspect 10 items in the spaceship
Inspect 5 items in the spaceship
Complete all Zone1 main missions
Scan 5 stars
Scan 2 stars with no planets in a row
Scan 1 planet in the LISA Solar System
Name 3 exo-planet or object
Name an exo-planet or object
Inspect 1 item in the spaceship
Scan 500 stars
Scan 1000 stars