after i tested this kills and tech point dont seem to stack when save is made for another tag.
same as previous make your way forward through the game..

when u get to vetical cover stay in cover and kill enemies..
get to bridge and kill your self. repeat untill u get achivement

Cliffhanger killer - Kill 50 enemies while in virtical cover 

from here just finish of the level..
you will come across alot f checkpoints but like i said it keeps putting me back to turret area..
saves are on hardcore but its not hard at all

