Sword Art Online: Memory Defrag (ソードアート・オンライン メモリー・デフラグ) is the 4th official application on iOS and Android platforms from its series.
Obviously, it's a mobile game in the form of 2D side-scrolling RPG. The game registration has been open already, and those who registered will receive items including diamond, apron, knife and Asuna in a sexy outfit.
Enter Here: http://sao-md.bn-ent.net/ to link the SAO world!!!