Dengeki's released a list of six endings and eleven special events that you can achieve in the game depending on how your actions. A bit of a spoiler really because it lists the conditions that has to be fulfilled.

Source:
• Dengeki

Related Links:
• Official PS2 Site
• Official PSP Site
• Sangokushi VIII to Get a PSP Port
• Sangokushi VIII, Release Date Changed and PSP Set Announced