I guess I am missing something, I tryed the EoSD and PCD one, I dont understand why all the fanart lol, its interesting side-shooter game with bad english. Speaking of games, I dont see much fatal frame fanart...
Correction, it's a good & interesting, and quite challenging, vertical shooter with lot's of funny and panderlicious characters. In frilly outfits.
But err, yeah, I guess it kind of is an odd phenomena on some level. Not much doujin-things you see used as the base of other doujins, at least on the same scale.
Meh, you guys just don't get it...it's fun, unique and cute characters. They have personalities that can grow can grow on you...erm, if you can read Japanese -_-