7 1 1Actions Report Solution You can do this easily playing in co-op (either story or horde) and have your partner run into a group of zombies and start getting hit and then just shoot them or use grenades. Be a stepbro and let your partner get the achievement too. Showing only comment. Leave a comment. I got it to pop on single player mode, assisting NPCs in Dead Ahead, on the second chapter.Posted by Big Johnny D on 13 May 21 at 21:04 Leave a comment