Dynasty Warriors

Sound test:
Finish the game with a characters from each kingdom.
Next time, you will see the "Sound Test" option on the option screen.

To unlock playable characters, finish Musou mode with the following
default characters:

Unlock Zhuge Liang: Finish with a person from the Shu kingdom.
Unlock Zhu Rong: Finish with any person marked as "Other".
Unlock Zhang Liao: Finish with Cao Cao.
Unlock Zhang Jiao: Finish with any person marked as "Other".
Unlock Zhang He: Finish with Cao Cao.
Unlock Yuan Shao: Finish with one person from each kingdom.
Unlock Xu Huang: Finish with Cao Cao.
Unlock Xiao Qiao: Finish with Sun Ce.
Unlock Wu: Zhou Tai: Finish with Sun Jian.
Unlock Wei Yan: Finish with Liu Bei.
Unlock Sun Quan: Finish with a person from the Wu kingdom.
Unlock Sun Jian: Finish with a person from the Wu kingdom.
Unlock Sun Ce: Finish with a person from the Wu kingdom.
Unlock Sima Yi: Finish with a person from the Wei kingdom.
Unlock Pang Tong: Finish with a person from the Shu kingdom.
Unlock Meng Huo: Finish with any person marked as "Other".
Unlock Lui Bei: Finish with a person from the Shu kingdom.
Unlock Lu Meng: Finish with Sun Jian.
Unlock Lu Bu: Finish with any person marked as "Other".
Unlock Jiang Wei: Finish with Liu Bei.
Unlock Huang Zhong: Finish with Liu Bei.
Unlock Huang Gai: Finish with Sun Jian.
Unlock Dong Zhuo: Finish with one person from each kingdom.
Unlock Diao Chan: Finish with any person marked as "Other".
Unlock Da Qiao: Finish with Sun Ce.
Unlock Cao Ren: Finish with a person from the Wei kingdom.
Unlock Cao Cao: Finish with a person from the Wei kingdom.