You mean well, but please relax.
A look at the history of Atelier announcements.
Say goodbye to that old hodgepodge of Mediawiki and Wordpress.
Even Gust is mean to the poor girl.
The first localized Gust game is a bit... not good.
The TL;DR is that the DLC exploded with Blue Reflection's release. The DLC practices remain bad to this day.
A list of the sales of Gust games, as best as can be found from public sources.
In a 23 game series, it's completely understandable to not know where to start. I'm here to break it down for you.
This is a small hobby site ran by a single person. I could use your help.