Simply put this will be obtained by doing hidden object games, I personally recommend finding all but one hidden objects then clicking right on the d-pad (
and match images. Matching an image with a red burst with a corresponding image without the additional red will automatically find the last object and that will be one of the games of Monaco finished.
This must be done for every hidden object game these are all story related and there is a guide below but is step by step and doesn't mention Monaco
Using Monico to finish a puzzle counts as a hint so it will disable the no hints achievment
The url posted below is an amazing step by step guide for how to complete the game note it does not cover missable achievments just story.
http://www.casualgameguides.com/games/w.cfm/Dark_Arcana_The_...If you downvote please comment so I may improve my solutions.