Not sure if it’s better to list here on on the wiki, but here we go.
I know this shop offers stuff for currency from Exceptional stories, and it’s all related to said stories.
The catch is: I’ve played only a handful, and even these were long ago, and don’t know which item is related to which story.
Yes, I know you can buy anything you want, but it would still be good to know what is tied to what.
The only thing I remember is that Machine for Murder is tied to the second story from Season of Blood.