Here is the full list of all 14 Hello Engineer: Scrap Machines Constructor achievements.
No boys allowed!
Spend three hours in the sandbox
Someone’s watching you.
Get a complicated mechanism up and running. Up to 8 running engines.
The third act completed
Destroy two drones in 10 seconds
The second act completed
The first act completed
Drive 100 meters in the upside-down position
Complete any level in 15 seconds or less
Flip a car upside down and recover
Stay in air without jets for 4 seconds
Connect 10 parts
Release a vehicle with two connected driver seats