Author has written 2 stories for Legend of Zelda, and .hack/SIGN.
I don't have much to say...except:
Appart from .hack, the golden age of Zelda(Oot,MM,TP), Code Geass, Deathnote, Kingdom Hearts, and Final Fantasy, I'm a little limited...
BTW!: .hack's category is screwed up. it's ".hack" or ".hack//Universe" not "hacksign" or "hack" or "dothack" or "dot hack" or ".hack//" or ".Hack" ect... Also, there are not seperate worlds by Anime, Manga, or Games. It is seperated by canon and non-canon on a faded grey line.