shoot through walls
No your kills and deaths are there forever!!!
.....shoot.
.
You shoot through a wall and kill someone. FMJ helps with this and if you get 40 with FMJ on you get extended mags. Doing this in Hardcore gametypes helps. Using a heartbeat sensor helps more.
You can get any amount of kills.
40 bullet penetration kills with full metal jackets (FMJ) selected.
Getting "wallbangs" or kills through walls with FMJ on. Using a heartbeat sensor at the same time (albeit n00bish) will deffinetly help getting this. Along with playing hardcore game types and using Turtle Beach headsets.
shotguns and knifes
no. shepperd kills him and burns his body
20
you shoot through walls. also, shooting people through windows works as bullet penetration
get one-shot-kills with a sniper to unlock