Call of Duty: Black Ops II

Start a Farm Survival game by going to Zombies > Green Run > Farm > Survival

Survive as long as you can in order to build points. Round 1 should be 5 shots to the leg and 1 stab to maximize points on killing zombies. Round 2 is 7 shots 1 stab etc.
Hit the random box as many times as possible until you receive the EMP device (looks like a flashbang).
If you do not have the device by round 10 a restart is advised or purchasing juggernog in order to minimise the difficulty of this achievement.
When you have the device simply horde up a sufficient amount of zombies (10 or more) by running in circles [around the truck in the middle of the map] and herding them together whilst avoiding being hit.
Throw your EMP device at them by pressing left bumper.
Easy 5Gs

Happy hunting
coreymawf

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All credit for this youtube video demo goes to Rooster Teeth.

Rather than going to the farm in a public match or solo setting, instead choose to make a CUSTOM game!

Doing so allows you to lower the difficulty to easy, which will make survival much more manageable, especially if you are playing solo, like I was.

I recommend buying the Revive right from the get-go, just as insurance in case you get caught off guard. In early rounds, shoot their legs and go for stabs as much as possible, as they are worth big points. Repair the barriers when there is down time. Open the main door to the house for 750 cost, then build up points until you have 950. Go to the mystery box on the second level balcony of the house. Hope for an EMP! Repeat this process until you obtain one. The EMP looks like a tactical grenade.

Now you need to create a mob of 10+ zombies in close proximity to yourself. This is easier to do around round 7 or above. Run around in circles until a large mass of zombies is grouped together. Press LB to throw an EMP at the group, and if done correctly, the achievement will pop. If you messed up your throw, keep in mind that you actually get 3 EMP's to use, so try, try again!

Best of luck,
Dan

Here's my video guide for this easy achievement. Obviously, you will need the EMP grenades, which you can obtain at the box for 950 points. The easiest method is playing with 2-3 people and get to the powerroom. The person going for this achievements needs to face the tunnel you've fell through while the other face the room the power switch is in. Wait until you got some zombies, tap and achievement unlocked!

Goodluck!

Here is my video guide telling you guys how to get this achievment. Keep hitting the box until you get an emp grenade then start a train, turn around throw an emp grenade and boom achievment.

This Video will show you how to do The Lights Of Their Eyes Achivement/ Trophy. You have to Pacify 10 zombiies with the emp grenade

Really easy !
( Sorry for my english )

- Start Custom Game.
- Map : First map ( deposit ) ???
Use :
- Difficulty : Easy
- Round start : 5 ( or 10 ) ( You start with 2500$ in round 5 )

Go open the door, and buy box for EMP grenade. After go on the right side of the box in the back corner. The zombies come in front of you, never elsewhere. Wait a little and use your EMP and Achivement !!!

( When i have unlocked my achievement i was playing lonely ) I think is good for more people too... But not try so i'm not sure.

Edit : Try with one friend he have unlocked this achievements ^^

The best way to unlock this achievement is in SURVIVAL mode both in the CITY and on the FARM because the two have a good space in the center, what you should do here is always try to earn as many points as possible, so try to kill with Melee Attack in the beginning, this will make you very point, when you have many enemies and you realize that it is too risky the Melee Attack start making circles on the map, that way you will gather enough enemies and just kill them with headshots, make sure you buy the Perk Quick Revive at the beginning of the game this will help you a lot if you are playing alone, to get the EMP grenade you need to spend 950 in the random box of the game (you can find it looking at the sky and you will see a beam of light), after at the end of each round leave a zombie alive and open the box until you get the EMP, after that just start the next round and wait for the maximum zombies to accumulate in a circle, and when you are sure there are 10 or more zombies throw the EMP .