There are two parts that you have to complete in the level AMON HEN. In the first part you have to kill a number of Uruk-Hai. The number is located on the top-right corner of the screen. The more Uruk-Hai you kill, the number decreases and when it comes to zero, it means that you have completed the first part of the level. In the second part of the level AMON HEN, you have to kill the boss of the Uruk-Hai. He will shoot you 3 times with his bow. After the third shot, he will pause. This pause gives you precious seconds to shoot him back with your bow. You repeat this step once more, and you will make him angry. He then takes out his sword. There are grey rocks around you. Stand in front of them and block with the SQUARE button. The boss will stab the rock. His sword will be stuck in the rock for 10 seconds. Hit him with your sword. Do this all the time around the other rocks until you defeat him. There are other Uruk-Hai to destract you while you are doing this.