Brilliant Inventor Achievement
Episode One passed without hints
This one is missable. There are several different types of hints, some show you an element you could create from ones you currently have, some show you two different element groups with elements that might react, and there are some that will perform a reaction for you.
Hints are accessed by a light bulb icon.
You cannot use any hints during episode 1 if you want to unlock this one. If you do end up using a hint on episode 1 you will have to uninstall and reinstall the game and start over to get this achievement.