Dynasty Warriors 5

Unlock all Wu Generals:
At the title screen, hold L1 + L2 + R1 + R2 then press
Up, Down, Down, Right, Left, Left, Right, Up, Down, Square, Circle, X.

Unlimited Musou Rage:
While playing, press
Right, Right, Down, Left, Square, X, Triangle, Circle, Circle, Right,
Left, Down, Up, Up, Up, Triangle, Triangle, Right, Right.

Unlock characters
Cao Cao      - complete any 4 Wei musou modes
Cao Ren      - complete Cao Pi musou mode
Da Qiao      - complete Sun Ce musou mode
Diao Chan    - complete Lu Bu musou mode
Dong Zhuo    - complete Diao Chan musou mode
Gan Ning     - complete Ling Tong musou mode
Guan Ping    - complete Guan Yu musou mode
Huang Gai    - complete any 3 Wu musou modes
Jiang Wei    - complete any 2 Shu musou modes
Liu Bei      - complete any 4 Shu musou modes
Lu Bu        - complete 1 Wei, 1 Shu, and one Wu musou modes
Lu Meng      - complete any 2 Wu musou modes
Meng Huo     - complete Zhuge Liang and Lu Xun's musou modes
Pang De      - complete Ma Chao musou mode
Pang Tong    - complete any 3 Shu musou modes
Sima Yi      - complete any 1 Wei musou modes
Sun Ce       - complete Sun Quan musou mode
Sun Jian     - complete any 4 Wu musou modes
Wei Yan      - complete Huang Zhong musou mode
Xiahou Yaun  - complete any 2 Wei musou modes
Xiao Qiao    - complete Zhuo Yu musou mode
Xu Huang     - complete any 3 Wei musou modes
Yuan Shao    - complete Cao Cao musou mode
Yue Ying     - complete Zhuge Liang musou mode
Zang He      - complete any 2 Wei musou modes
Zhang Jiao   - complete Liu Bei, Cao Cao, and Sun Jian's musous
Zhu Rong     - complete Meng Huo's musou
Zhuge Liang  - complete any 1 Shu musou mode
Zhuo Tai     - complete any 1 Wu musou mode
Zuo Ci       - Unlock every other character

 