If you are hunting for achievements in Railway Islands – Puzzle, this is an 100% achievements guide which will help you out.
The other two are:Ops! : something is wrong!
This is simply failing a level, for this you only have to put the first piece wrong and make the train start.
Forgot something? : maybe you forgot something.
This achievement requires going through a level without getting all the items along the way.
Just build a direct line to the exit without thinking about going through the assigned points.
Example. Level 14