Play The Battle Of Jian Ye level under the hard difficulty setting with Liu Bei's forces. You must play with Huang Zhong and defeat the officers with Huang Zhong. First, do not defeat any of the fake Sun Jians (that appear in four different places). Defeat Huang Gai, Taishi Ci, or Zhou Tai. This allows for the gates of the real Sun Jian's main camp to open. After this is done, you must defeat Sun Ce, Sun Quan, and Sun Shang Xiang at least once before any of them become commanders of the Wu army. A message stating that you have acquired Huang Zhong's level 10 weapon, the Oracle Sword, will appear. Then, finish the level.