King Of Fighters XIII was already available on Arcade while a Console release was planned for October 2011 release. It seems like some of the users were able to hack the arcade version and it is available now on torrents everywhere.
It seems that this release is packed with bugs and glitches. The game is working fine for some while others are having trouble with it. Hackers are trying to fix these bugs at the moment. There is no online multiplayer although single player is working fine.