Ninja Style Achievement
Stealth takedown 4 enemies at once in a four player co-op game.
This is the only achievement that will require you to be online and playing with 3 other players or 2 if using a split screen co-op partner.
The ideal spot is on Chapter 1, Checkpoint 2 (Future Proofing).
There will be two guards straight ahead and two snipers on raised platforms beside them. Two characters will have to climb ladders and the other two will perform stealth kills out of cover.
This can this be done with 2 players both using split screen, an extra controller each and guest accounts.
Video guide by WORLDEATER