client -> http://www.hyruleonline.net/downloads
possible solution to get client working
http://ubuntuforums.org/showthread.php?t=1205925
i couldnt find a contact email to send this to the developers so im posting in forums.
i dont know if i got it working due to the game server being down but maybe these steps can be in the next release to make this easier for someone else.
online rpg game engine
Give people some time to answer; this is not a chatroom or paid support desk after all. 
I'm not really able to help, by the way, other than asking what terminal output you're getting (run the application in a terminal and you'll probably see a whole bunch of lines being outputted by Wine, which can help the developers understand why something might not work).

I'm not really able to help, by the way, other than asking what terminal output you're getting (run the application in a terminal and you'll probably see a whole bunch of lines being outputted by Wine, which can help the developers understand why something might not work).