Jade Empire

Dirge title screen
Finish the game once to change the title screen.

Unlock Dragonfly mini-game in the main menu:
When you're confronted with enemies during the game, choose the
"Attack" option between each chapters and finish the Dragonfly
missions

More dragonfly mini-games:
Speak with Lord Lao in Imperial City that's standing by your followers.
He will offer you a quest to get machine parts.

Extra dialog
Finish the game once watch the entire credits. At the end of the
credits you will hear a bonus dialog from different characters.

Use the Chi energy to restore health:
Hold the B button (block) and hold the White button (heal), when you are
low on health in he middle of battle. This will drain the Chi energy, but
you can heal yourself without getting any damage.

Get all three endings easily:
Save your game near the end of the quest. You can choose to complete the
game as you wish and watch any of the three different endings.

Get new technique from Sweet Poison Lyn:
Beat Imperial Arena with flawless victory

The Gaze Of The Lion free matra
Do not destroy the altar in Li's house. Take the coin you get from it.
Go around back to the old master's tomb and drop the coin in the bowl.
You will get the Lion Medallion. Take the coin back around to the statue
and place it in the lion's mouth. Then, use the statues to make the
color combinations to get the "The Gaze Of The Lion" Free Mantra.