RPGs:
http://vgchartz.com/games/index.php?name=&console=DS®ion=All&developer=&publisher=&genre=RPG&keyword=&boxart=Both&results=50&order=Hits
Adventures & Action Adventures:
http://vgchartz.com/games/index.php?name=&console=DS®ion=All&developer=&publisher=&genre=Adventure&keyword=&boxart=Both&results=50&order=Hits
DS = best system this gen in my opinion