Edit
Overview
Pop'n Music 4 features new songs and needs Pop'n Music 2 to work. An Append Disc is a disc that cannot be run on its own, and instead must be loaded through use of another disc (a Key Disc). In other words, you have to load the Key Disc first, then select a special load option (in that game), to be able to play the Append Disc.
Alternate Names
No information available
Wikipedia
No information available
Video
No information available
Cooperative
No
ESRB
No information available