I took pictures of all the locations of the secret rooms and the locations to finish the sidequests in the game. I may have missed some, but this is at least some of them.
 
 

Secret Rooms

Secret Room #1
 
 

 
 
Secret Room #2
 
 

 
 
Secret Room #3
 
 

 
 
CLICK ON THE WATER IN HERE. You get an item that is way too good to miss
 
 
Secret Room #4
 
 

 
 
Secret Room #5
 
 

 
 
Secret Room #6
 
 

 
 
Secret Room #7
 
I don’t know where this one is, I searched everywhere between 6 and 8
 
 
Secret Room #8
 
 

 
 
Secret Room #9
 
 

 
 
This one is inside secret room 8, so don’t miss it!
 
 
Secret Room #10
 
 
Secret Room #11
 
 
Secret Room #12
 
 
Secret Room #13
 
 
Secret Room #14
 
 

 
 
Still working on finding more.
 
 
 

Sidequests

Missing Dog:
 
Where to get:
 
 

 
 
Where to finish:
 
 

 
 

 
 
Here we come to an end for the Secret Rooms and Sidequests – Opaline guide. I hope this guide has helped you with your gameplay. If you have something to add to this guide or believe we forgot some information to add, please let us know via comment! We check each comment manually by approving them!