In Free mode, select the Battle Of He Fei Castle as the Wu Forces on the Normal difficulty setting. Start by taking out the officers outside the first gates. One of them will drop a Life +20.

Next, kill Xu Huang for an Attack +8. Then, go around the right side, killing all officers, sub-generals, and anyone with a name. You should always get +4 power-ups. The officer on the horse will drop a weapon. Collect it, then go through the "security system".

You will eventually meet Cao Ren. Kill him for a +8 Defense, then go up and kill Xu Zhu for +8 Attack. At the left of this platform is a crate with a weapon box in it. Go through the gate and take the path to the left. The officer there has a +8 Defense. Then, cut across to the right and kill Sima Zhao for a +4 Defense. Next, take out Sima Yi for a +8 Defense.

Finally, complete the level by killing Cao Pi. This will max out the stats at the character selection screen, but only half-way at the action selection screen. Youmust use the level 20 amulets to max this out.

Also, this is not the best place to use a fresh character. Get a little boost by completing the Yellow Turban Rebellion level on the Easy difficulty setting a few times to get some weapons and some basic stat boosts.

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 1 Wu musou modes.
Lu Meng: complete any 2 Wu musou modes.
Meng Huo: complete Zhuge Liang and Lu Xun's musous.
Pang De: complete Ma Chao musou mode.
Pang Tong: complete any 3 Shu musou modes.
Sima Yi: complete any 1 Wei musou mode.
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 Xiahou Dun's musou. mode.
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.
Zhang 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 all of the other characters.