Tag mod and Music Options: Beat the game
Beat a level to unlock it in VS. mode.
Unlock Banzai and Tombland map: Beat Tombland
Unlock Chowlow and Spaceland map: Beat Spaceland
Unlock Daio and Bioland map: Beat Bioland
Unlock Dangun and the Westernland map: Beat Westernland
Unlock Kurione and Pirateland map: Beat Pirateland
Unlock Majinai and Horrorland map: Beat Horrorland
Unlock Manitron and the Casinoland map: Beat Casinoland