Here are some cheats and tips for the game Dynasty Warriors.
Play as Sun Shang Xiang:
At the title screen, highlight 1P Battle, and press Left, Left, Up,
Down, g, l, L1, R1. You should hear a confirming sound. Then, at the
fighter-select screen, highlight Zhao Yun and press Left. Sun Shang
Xiang is now a selectable character.