Yoshinori Yamagishi, Square Enix's Star Ocean series producer, really wanted to make erotic games. We brought word of this back in January. When asked about this, Yamagishi can explain:
This is actually a quotation from a conversation I had when I was still talking with Enix before the company merged with top management people. I said yes, maybe one day I would like to try something more adult content. That's true! But that's not to say that we wanted to create something erotic and ended up with Star Ocean: the Last Hope. That's not the case.
Oh no. Sure, we believe you.
Yamagishi also talks multi-platform. Star Ocean 4 is an Xbox 360 game and, according to the producer, runs on an game engine that makes it technically possible to do a PS3 version or a PSP or a DS version.
Star Ocean 4 Interview [Videogamer]