Defeat Cao Xing immediately. Go all the way Northward across the center water path before Yuan Shu appears (approximately 5 minutes into stage). Encounter Cao Xing after he reappears. Achieve 100 KO Count. A commonly made mistake is to exit the water path before going all the way North. If you go up the stairs on the left side, that would not be all the way North. The correct exit is the stairs on the right side at the North end of the water path. It seems after Cao Xing reappears, you only need to encounter him to get the weapon, but I defeated him anyway. Do this on Expert mode
Get on Hard mode and achieve 150 KO Count before the carriage goes through the water path, which is about four minutes
Kill Guan Ping, Zhou Cang, Liao Hua in under 2 minutes
Defeat Zhou Cang. Defeat Liao Hua. Defeat Guan Ping. Guan Yu angered. Get Weapon. On Hard
Get 800 kills in Hard Mode
On hard mode get 50 kills in 4 minutes
Get 100 kills in 3 minutes on hard mode
Achieve 300 KO Count in under 4 minutes on hard.
Get 100 kills in 6 minutes and 35 seconds on hard mode
Get 300 KO Count in under five minutes and win with the difficulty on hard
Achieve 100 KO Count in under 4:30 minutes on hard.
Don't let any one pass the bridge and kill all generals on hard
Kill Cao Ren, Zhang He, Xu Zhu and Xu Huang on hard mode
On hard mode, get 400 KO Count before Xiahou Duns reinforcements comes
Before your ally troops get eliminated, defeat Guan Xing and stop the rock attack on hard
Beat Hua Xin, Hua Xiong and Lu Bu in under five minutes on hard