Here is the full list of all 22 Doodle God achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
All reactions revealed
Survivor quest completed
Save the Princess quest passed
Sins vs. Virtues quest completed
Greatest Inventions quest completed
All episodes passed without hints
All reactions with Philosophers' stone discovered
Episode Three passed
Episode Four passed
Games created
All Bad things created
Alle drankjes aangemaakt
Episode Two passed
Episode One passed
Episode One passed without hints
10 groups created
Life created
Human created
Similar elements reacted
6 elements created
Element created 3 or more times
Run, Santa, run quest completed