This is the only semi-difficult accomplishment, so I thought I would provide a quick reference. Make sure you grab all of these before you face the King!
 

Epitaph 1

As you move through The Crypt you will eventually reach this staircase:
 
 

 
 
To open the door, attack the blocks:
 
 

 
 
 

Epitaph 2

This one can be found in The Field, just before The Clocktower. To descend, attack the blocks:
 
 

 
 

 
 
The lower level with an epitaph will take you into The Cave if your head is to the right. I have not tested this, but it may be possible to enter this area from that direction.
 
 
 

Epitaph 3

This one is located in The Town. It can be obtained after you have completed the double jump.
 
 

 
 
Jump off the combat dummy and then proceed to the top of left-most building. To enter the area with epitaph 3, you can turn left.
 
 

 
 
 

Epitaph 4

You will descend along the main path of The Underworld. You have the option to turn left. Follow that route and you'll be able to collect epitaph 4.
 
 

 
 
 

Epitaph 5

The Clocktower's entrance is located directly above the dash-upgrade. To reach the upper left-hand corner, you will need to jump on a large cog. I don't have a picture of this one and I discovered too late that you can't go back once you've defeated the King.
 
 
 

Epitaph 6

You will find a large staircase that leads to The Ramparts shortly after you enter it.
 
 

 
 

 
 
Hope you enjoy the Guide about Simona’s Requiem – Achievement (It wasn’t a secret to everybody), if you think we should add extra information or forget something, please let us know via comment below, and we will do our best to fix or update as soon as possible!