If the difficulty setting is on normal or hard after you complete the Wei-Shu Conflict a secret level should appear depending on which side you are on. If you are on Shu it will be be The Battle of East Lau ,if Wei The battle of Chang Zheng.
Submitted by michael williams
When your on Lui Bei's team on the battle of xu after Guan Yu defeats LiDian there should be a bridge in front of him, tell him to go across the bridge and he should locate the enemy supply compound destroy it and all of the remaining enemy units morale shall seriously go down you can then send Guan Yu to attack Xiahou Yuan from behind. while this is happening if Zhang Fei defeats Yue Jin,Himiko shall appear behind Guan Yu.
Submitted by michael williams (hehehe)
You should always cast the spell where the brightest red/green (when you play as Cao Cao) dots are. That way you will kill more and lower the enemies morale faster.
Submitted by Manuel gandia