This being another Korean Registration Guide I will not give out any KSSN information or how to obtain them, please don't PM me about it either. Thanks.

http://www.mgame.com/
KR address : 거진읍

From here on its pretty self explainitory.
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg01.jpg
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg02.jpg
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg03a.jpg
//NOTE HOTMAIL emails arent valid, nor is yahoo.com,Yahoo.kr is though.
ID verification
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg04.jpg
Address
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg05.jpg
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg03b.jpg
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg06.jpg
http://img.photobucket.com/albums/v253/Daiku/Tutorials/mg07.jpg

And there we have it, your MGame account is done.