KD

KD is a name related to several songs in The King of Fighters series of fighting games that serve as the theme of K' and his companion Maxima.

The KD stands for the initials of K' (Kay-Dash).

KD-0079
KD-0079 is the first in line of the KD series of songs. It mirrors the adventures of K' and Maxima into finding the NESTS cartel and Kyo.

This song is, as its name implies, a nod to K' being the 79th in line of the Kyo clone project.

The song returns in The King of Fighters 2002 albeit a bit faster.

It was remixed for The King of Fighters 2002: Unlimited Match titled "KD-0079+" It features a new intro and has a new hard rock-techno feel to it.

KD-0084
KD-0084 is the second in line of the KD series of songs. It mirrors the further adventures of K' and Maxima into finding the man behind Project '00.

The song returns in The King of Fighters 2002 albeit with additional notes before the refrain without a drum solo in between.

KD
KD is the third in line of the KD series of songs. It is essentially a remix and remaster of KD-0079, as evidenced by the intro.

This song is noticeably darker than the other KD series, as it mirrors Mukai's quest to unseal the Orochi with K' and Maxima having to stop such a thing from happening.

KDD-0075
KDD-0075 is the fourth in line of the KD series of songs. The song code is renamed to "KDD" to connote the additional "KD" that is Kula Diamond.

The song is noticeably higher in quality than the other songs of the KD series due to the Atomiswave's hardware, though an arranged version is also possible.

KDD-0063
This song is one of the two available themes for the K' Team in The King of Fighters XIII, the other being KDD-0075. The song features electric guitars and seems faster paced compared to other songs in the KD series. Because of newer hardware that allows the game to play sounds at a better quality, the theme does not have an arranged version.