- Gameplay includes rooftops and sewers and there will be rain (not that big a deal to me, actually)
- Pachinko Slots returns from its noted absence in Ryuu ga Gotoku 3 (groan), plus "Hot Springs Ping-Pong" has been added as a game to play against cabaret club girls. It showed a picture of the girl in the hot springs bath after the match, plus shots of Kiryuu and the girl wearing bathrobes as they played ping pong. Maybe you win the chance to get in the bath with her...?
- Fishing, "Make the #1 Cabaret Club Girl," and Karaoke return. You can sing duets in Karaoke now.
- There are four different fighting styles (of course). They describe it as being able to control "Speedster Akiyama," "Unrivalled Lightweight Suejima," and "Detective Action Tanimiya," for whatever that's worth.
- Revelations return. Tanimiya is shown writing down something in his memo pad as if he's getting a new move, but they specifically do confirm the return of this system in the text.
- Chase Battle (no!) returns. That must be the whole "Speedster Akiyama" thing. Well...I guess he's kinda a loan shark. Probably has lots of dudes running from him. There are a few pictures of the supposedly evolved system featuring Akiyama chasing some dude.
- There are four different fighting styles (of course). They describe it as being able to control "Speedster Akiyama," "Unrivalled Lightweight Suejima," and "Detective Action Tanimiya," for whatever that's worth.