Hey Breathless! 
I quickly introduced you to the Plug Ins and Add ons model in the recent Psychosis devlog. I thought adding a quick guide here might help for present and future instalments! So, here we go.

All Evanescence related products will be one of two types: Plug Ins and Add Ons.

- a Plug In is a standalone game with a connection to the universe. You won't need to use the main Evanescence book to play: it's standalone, so you can just take it, try it, whatever. But it will help you getting through the Evanescence mood if you look at it from a higher perspective! 
- an Add On is a rules module or scenario, something referring to the Core game or other Plug Ins. It will still be usable as a module for your home-brews, since I'll stick to the "show don't tell" approach, so you can just get a few rules you like and ditch the rest if you don't care about the universe related blurb! 

All Plug Ins will have the same structure (cover + 2 pages ruleset + sheet); all Add ons will be one page, instead.

So that's it for the Evanescence publishing model! Hope you like it! Share your thoughts, reports and insights! 
Cheers and... Take a deep Breath!