Arcade port of the PS2 Melty Blood Act Cadenza. Came with a new character White Len, as well as a hidden character Neco-Arc Chaos. An updated version called Act Cadenza Ver.B2 was released on March 20th, 2007 that fixed several glitches. In July 2007 Act Cadenza Ver.B2 was ported to the PC as Melty Blood Act Cadenza Ver.B.
A PC port of the arcade Act Cadenza Ver.B2 was released in 2007 that includes new gameplay features, include a tag-team mode, a 4-player team battle mode, a programmable dummy for training purposes, and a new hidden boss character, Neco-Arc Chaos Black G666. The Limited Edition of Act Cadenza PC version came with a 2-disc set soundtrack.