Extra Jet Li Skins:
Complete the game once to unlock Once Upon a Time in China and Fist of Legend skins.
Bonus Videos:
Complete the game once to unlock Young Kit Yun and Young Michelle Videos.
Hard Difficulty:
Complete game on Normal.
Get Extra Adrenaline:
Hold the Left Analog Stick in any direction after you finish a combo and Jet Li will strike a pose, increasing your adrenaline bar.