Note: Several people have reported the the Dropshot execution is not registering at the moment. Right now, there doesn't seem to be a solution to this problem. Could be a server side issue or, knowing how TC operate, they've broken something in this recent update.Note Update: A couple players experiencing the Dropshot issue have managed to get it to register after hard resetting their console and trying again.----------------------------------------------------
So, this achievement pays tribute to one from Gears 3. The objective is the same, perform one of every execution. That's all the basic weapons, power weapons, bag and tag with a grenade and a drag-over-cover knife execution. For all of the executions, you will need to down the opponent and then hold
on their body.
Additionally, the achievement can be done in private play with a second controller). Connect a second controller to your console and press the menu button. Sign in a guest or a second profile. When you go into private play, you'll be COG and your second controller will be swarm.
From the main menu, select Versus and then Private Play. Select Team Deathmatch. If you press the menu button, you'll be able to tweak match settings as well as what weapons spawn on the map. This is useful if you can't remember which weapons are on which map.This achievement is also trackable so turn on your achievement tracker to see if the execution registers.
If you're also unsure of which weapons you've done an execution with go into your War Journal and check your weapons.
War Journal > Press 
> Scroll with your right thumb stick. Your stats should show how many executions you've done for most of the weapons.
Weapons:
- Lancer
- Hammerburst
- Gnasher
- Enforcer
- Markza
- Torque Bow
- Boltok
- Dropshot
- Boomshot
- Retro Lancer
- Embar
- Overkill
- Longshot
Power Weapons:
- Buzzkill
- Mulcher
- Tri Shot
- Salvo
On top of this, you'll need to perform:
- Bag and Tag: Pick up grenades, down and enemy, press
on their body and then press
on the d-pad
- Knife Execution: Place your second controller behind cover, go on the opposite side of him against the cover, push
on your left thumb stick and then press
to drag him over. Press
to knife execute him
I was stuck at 89% until a friend pointed out that these two needed to be performed again in order for them to register.
Unsure of this one but ... down an opponent, select your snub pistol and then press
to execute him. You'll perform a beat down. Again, unsure if this one counts so could someone confirm please? Thanks.
That everything I can think of. If you have any suggestions on how to improve the solution or any more information to add, please comment below. If you leave a negative vote, please state why. Thanks.
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Edit 1: This achievement is retrospective meaning you will already have progress towards it prior to this update (
Thanks Yurgi Windu)
Edit 2: another knife execution to do would be to vault over cover and kick your opponent then hit
to execute (
Thanks The SCHWARTZ 00)
Edit 3: Drag-over-cover knife execution and bag and tag executions have been confirmed to NOT be retroactive
Thanks to CodeMonkeyGuy and Anthony2690Edit 4: The neck snap execution also counts for this achievement.
Thanks to T Dawg182 and shelbygt5252. I believe it's retroactive as I didn't need to do it for my achievement.
Edit 5: The Snub Beat down execution also seems to be retroactive.
Thanks to iguanadude626.Edit 6:
Fed kaffe has made a tracker that's shows exact progress to the achievement
https://xbltracker.com/