Here is the full list of all 9 The Oort Cloud 2020 achievements.
Win the game on easy setting
Win the game on normal setting
Win the game on hard setting
Win the game on extraterestrial setting
Spend 10 points in tech improvements
Spend 20 points in tech improvements
Spend 30 Points in tech improvements
Spend 40 Points in tech improvements
Spend 50 Points in tech improvements