You need to complete all of the Prestige challenges (not only the ones labeled prestige challenges but the weapon veteran and master challenges as well), probably the most time consuming challenge too. I am a tenth prestige level 70 with all of the "Prestige" challenges done, but don't have the symbol. Who is going to get 1000 multikills with the Javelin anyway.
Get payback 25 times with a headshot. Looks like you don't do too well with headshots and accuracy. Or you just don't die as much.
You unlock it by getting to 10th Prestige.
Complete all prestige challenges. You must be prestiged at least once.
The highest rank is Prestige 10 at level 70, the emblem is a circle with a skull inside of it.
anything that you like, because its what you prefer, no what other likes, and in my opinion I would choose a gold skull title will be fine :), for emblem I like the nuke emblem, and you unlock it when you call in 10 nukes :)
you have to kill 4 people with 1 desert eagle bullet, and at the same time recite the holy prayer.
You have to get 500 kills for the silver title, 1000 kills for the emblem (silver) 2500 kills for the White skull title, 250 headshots for the silver title with a headshot emblem in it, 1000 for the gold emblem or 2500 for the Gold skull emblem. This is for Submarine, Assault and Light Machine guns other weapons may vary but just look it up in the challenges section. Hope this helps :)
In the NX Cash shop
He is your teammate in Task Force 141, he has a noticeable skull mask.
The pirate flag emblem is currently unknown and not verified... but the skull and bones emblem is when you get twenty game winning kills.
To get the green title and skull emblem you will have to buy Call of Duty Elite then put in your account password and username. Then go on PSN and check your titles/emblems. To get the grey one with red skull just sign up and then go on PSN and check your title/emblem.
See related links.
It was after 1930 when motorcycle riders were being thought of as outlaws, and using the skull and crossbones as their emblem. The company needed to change this image. Willie G. Davidson came up with the "skull and wings" logo. Article Source: http://EzineArticles.com/3963945