How to get the The Only Guns You Need achievement in the End of Zoe dlc.
The Only Guns You Need Achievement Guide
Your main problem for getting the coveted achievment will be infected alligators waiting for you in the water. You will not be able to get around them, the vile reptiles will attack you and kill you. You will also not be able to use spears, because then you will not get the achievement for which you, in fact, came here.
However, there is a way out! The fact is that the game does not consider metal gloves as weapons, one of which you find at the end of the game. I recommend that you complete this dlc on heavy difficulty, so that you can get the AMG-dual version for both hands as a reward.
Now about how to get rid of the nasty alligators. It's simple. Charge both gloves at the same time by holding down the right and left mouse buttons, and then strike in the direction of the reptile. The fact is that the gloves create a powerful shock wave that hits on fairly good distance. You will stay safe, and the monster will die.
I recommend getting this achievement on medium difficulty level. There is no point in deliberately complicating your life and dragging yourself to hardcore.
I wish you good luck! Experience how far the shock wave of the gloves hits, remember the location all of the alligators, and you will easily get this achievement!