This is the most common of the covenant forces. Small but tough, the Grunts travel in numbers and are  able to carry plasma bazookas. Being the smallest of the covenant forces, they are also the weakest.  They tend to hang around Elite and Jackals. Thus kill the Elite or Jackal and they will run scared. The best way to do this is to throw a plasma grenade  on him that will stick to his clothes. Then he will  run around in circles and after his own men saying "GET IF OFF ME GET IT OFF ME!!!"

 

This is an Elite, as you can guess they are, well...  elite. They use a combination of their speed and agility sided with precision shots and  attacks. An easy way to disable Elites is to knock them out by using the melee attack from behind. They also really like it  when you throw a plasma grenade on them. But be careful! They can still run after you and take you with them.

 
 

This is a Hunter. One of the most feared  of the covenant forces. Theeir tough armor  and weapons make them a formidable opponent. Built into their arms is a  plasma bazooka. Alongside with power comes a shield that will block even the  most armor piercing shots. Not only are they equipped with a big gun, but their shield doubles as a weapon they use  to launch you into the air. The easiest way to take out a  Hunter is to shoot them in the  soft fleshy orange part on their back. One shot  and they're gone. Also, try to punch them to death, ( they're extremely  slow).