Here are some tips for Cerberus Project, A 2D fighting game that is available on the PSP in Japan. These tips can unlock new characters to complete the roster of the game
Burst Cerberus: Ending the 11 main characters at least once in vs CPU or 2P VS Cerberus.
Fencer Burst: eliminate the 11 original characters at least once in vs CPU or 2P VS Fencer.
Kusanagi: eliminate the 11 original characters at least once or VS CPU VS 2P Valkyrie.