In this video you will learn how to complete the "Finish Him" achievement in GTA IV. In order to do that just follow these steps. First you will need to go in a crowded place. You will need to get 10 melee counters in 4 minutes. To complete a counter attack you will have to press the A button when the enemy tries to hit you. After you dodge the attack you will have to press the B button in order to punch him back. Just repeat this process for 10 times and you will successfully get the "Finish Him" achievement.