Here is the full list of all 19 7 Billion Humans achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Orange path fully optimized
Blue path fully optimized.
Green path fully optimized.
Your solution fails more than 50% of the time.
Finish the Mom and Dad of Invention cutscene.
All levels complete. Congratulations.
Red path fully optimized.
Finish the Morning Petroleum cutscene.
Solve any puzzle with at least 4x the number of commands required by the size challenge.
Finish the Fitness Program cutscene.
A worker is shredded by a killbot.
A worker is a crushed by an appliance.
A worker exploded.
Listen to all worker thoughts in a level.
A worker is shredded by a shredder.
Solve any puzzle with at least 4x the number of seconds required by the speed challenge.
Finish the Intro to Morale Officers cutscene.
A worker fell into an infinite pit.
Finish the You're Hired! cutscene.