The King Of Fighters Maximum Impact Regulation "A" HDD & USB are crucial parts to play the King of Fighters game in an arcade machine, and is a upgrade to the fighting game developed by SNK Playmore, KOF: Maximum Impact 2.
It was released for the Taito Type-X2 arcade system in July 2007. It is the only arcade release made for the KOF: MI series. It adds the classic 3 on 3 game play from the 2D KOF series with the hopes of winning over the series' fanbase as well as new players.
Several stages as well as the story and challenge modes from Maximum Impact 2 have been removed; plus, all of the characters have lost half of their outfits in both normal and alternate types.
Some new music, including songs from the original Maximum Impact and Sengoku 3 have been added, in addition to new alternate versions of stages and a new level for Makoto Mizoguchi.