Army of TWO The Devils Cartel

Credit to Jack Trauma xx for finding this grinding spot in his Double Trouble guide. There are a lot of questions on some of the grinding in the game, and I hope to clear some of that up and add to it.

EXTRA NOTE: The Overkill Contracts people talk about playing are part of the Overkill Edition DLC with new copies of the game. People renting the game or buying used will not have these missions to play.

You can get all 3 overkill achievements in one session with this solution.





1) You will want to play a solo game on easy. (co-op doubles the grind but is an option if you want)
2) Load Chapter 23. Into the Light. (We will be grinding in Chapter 24 but you need to fill your Overkill meter)
3) Play through Chapter 23 and into 24 until you breach the room with the mounted machine gun in the back of the church.
3a) Make sure the AI uses Overkill as soon as they get it available, once the AI uses it once, he will not use it again, and you can safely save up the AI's Overkill meter for the last checkpoint. If the AI does use Overkill, reload the checkpoint. (Thanks CounterInsurgnt for the info)
4) When you breach the door with the mounted machine gun, you will get a checkpoint. This is where the grind starts.
5) Press UP on the D-pad while aiming at the mounted machine gun to have the AI jump on it. This will spawn the grenadier at the back of the room.
6) Take cover to the right of the AI against the wall. and wait for 2 grenades to hit the wall knocking a hole for you to shoot through.
7) Now to hit Overkill! To activate the AI's Overkill, press Down on the D-pad.
7a) For Moocher, only activate the AI's Overkill with Down on the D-pad.
7b) For Overkiller, only activate your Overkill with LB.
7c) For Double Trouble, activate both Overkill meters pressing Down on the D-pad and LB together. (there is room for delay if you need it)
8) while behind cover, look to the left of the room. There is a hallway upstairs that enemies spawn from. Using Overkill, kill the enemies as they run out of the hallway. Do not focus on the enemies in the back of the room because they are harder to hit. As you kill enemies running out of the hall, more will spawn and they are much easier to kill than the ones in the back of the room and makes best use of your Overkill.
9) Once Overkill is gone, pause the game and reload checkpoint. Repeat steps 5-9 until all 3 achievements are unlocked.

Side note: The counter seems to be off in the stats menu and you may not get the achievement at 200 double kills. Just use the method above until the achievement pops and it should be over in no time.

Okay I tried the guide made by Fuzzmeister J and while he has a fantastic guide and idea it sadly didn't work for me. Everytime I tried to approach the machine gun post my AI partner would activate his overkill and ruin my chance at even trying his guide so yeah that sucked for me.

Anyway my method involved alot of his but I got all of my kills for overkill before I reached the machine gun post. I simply gunned down the same 10 guys and reloaded the checkpoint until I heard that achievement pop!

I made a video aswell to show that reloading checkpoints works fine and you can do this alone with the AI as your partner which is much faster if you ask me.

Video below showing the method I repeated about 20 or so times. Good luck guys and enjoy the video.

I tried Fuzzmeister J's solution, but I think the method I found was quicker, easier to set up, and more reliable. You can get about 6 kills every thirty seconds this way, so even if you had no overkills, you could get each achievement in about 16 minutes. It uses a similar setup to Fuzzmeister J.

1. Start a solo game on easy on chapter 23.
2. Play through chapter 23, but be sure neither you or partner uses overkill. If partner uses it, reload checkpoint.
3. At the start of chapter 24, you will go up two sets of stairs and will have to hold X to breach a door. Move forward and you will get a checkpoint.
4. There is a door ahead and (at least) 6 enemies will come out of the door.
5. Activate the appropriate overkill mode:
Moocher: press down on dpad only
Overkiller: press LB only
Double Trouble: press both LB and down on dpad
6. Kill the enemies.
7. Reload checkpoint and repeat steps 4-6.

I think this method is better because you quickly and reliably get six kills per thirty seconds. Also you don't have to repeatedly do the mounted machine gun part. You probably will get fewer kills per attempt, but this method probably takes 80% less time per attempt, so you should get far more kills per minute average.

i found it easier to do my grinding for these kills by doing the chapter number 33 called 'game face' on 'Narco Hell'

if you play a chapter or 2 just before it to build up overkill for yourself and you AI partner then keep it until the chapter in question, you get your masks back then you have the checkpoint then leave the room and in the next room there are a number of enemy soldiers to kill using your pistol, once they are dead then reload and it starts right outside the room of the enemies you just killed.

there maybe other ways than any of these guides so far but i just found this more easier for me.

once all the overkill or both overkills have run out just reload the checkpoint.

I just realized you can load chapter 23 and build up your Overkill bar while proceeding, when you kick in the door where you find a soldier with a shield, your bar should be filled up already by now. I entered the following room and ran towards the end of it, a lot of enemies spawned from the front, the left and the right door and I activated the double Overkill. I got 18 kills for one try so I'm gonna stick with this method. I'm playing solo and on easy mode.