heya guys
i made a video on how to get socket to me & six pack at the same time :)
to start with you must get to level 51 so just play some zombies or multiplayer and come back to this achievement when your level 51
now what you need to do is grind for crystals
the crystals are the purple crystals awarded at the end of a game
to get the crystals i used 3 methods
method 1
get to round 11 , call an extraction then just fail the extraction ... this usually gives you just the 1 crystal but sometimes thats all you need
method 2
get to round 11, call the extraction and make sure you complete the extraction (completing the extraction gives you more crystals but you do need to turn the power on first)
method 3
same as method 2 but get to round 16 instead
you can extract every 5 rounds but obviously it takes longer and just gets harder
the weapons i use are the knife and the shotgun that is near the downed plane
once you have enough crystals you can upgrade your perk skills in the loadout section under the skills menu (each perk has 3 upgrades)