This is the Spartan I talked about in my last pic, they one that almost killed my elite character. They are spartans used as a last resort, they are fully armored and complety bullet proof, they are almost unstoppable but they are very very slow and can't fire weapons very well. On the S Spartans back is a bomb with the power to wipe out whole cities, they are sent into an area and set themselfs off, killing everyone. They have only been used 3 times, but each time they have killed 1000's of people.

Also note that the bad guys or evil army are the only ones who use S Spartans, they don't care about the lives they take to get a job done.