Knight Squad

For this achievement you must kill 7 other players quickly to get an extermination. Not sure if you can get this with 8 controllers or boosting with a friend online but this is a way to get it by yourself with one controller. Play local and pick Juggernaut, 5 minutes and easy bots. there will be a mini-gun in the middle, grab it or kill the guy with it so you have it and then kill 7 other guys quickly to get an extermination multi-kill streak. Here is a video of it being done.


*Update* read V I D D E O‘s advice in the comments

Another method that worked for me was to use a second controller with bots disabled, the juggernaut mode on the bunker map.
The second controller would pickup the minions pickup twice then hide in one of the smaller square rooms off to the side.
This would mean 9 "enemies" hiding in a single small area allowing you to easily get 7 kills in quick succession with the minigun

Here's the technique I used to farm my 1,000 kills, which you'll also most likely get the Exterminator (7 rapid kills in a row without dying) achievement in the process with very little effort.

Game mode: Juggernaut
Level: The Bunker
Time: 5 minutes (max time)

Take the minigun back to your spawn and point it outwards where the AI will proceed to constantly walk into it.

At some point, the AI will pick up the Kamikaze power-up, which makes them invincible until they explode, which will kill you.

However, since you're in your own spawn, you should be able to respawn fast enough to stop them from taking the mini-gun away from your spawn. Repeat this a few times and the 1,000 kills will unlock quickly.

In the video, the kills for the Exterminator Achievement starts at around 2:18 and unlocks at 2:25.

I have two techniques -- one for if you have a boosting partner, and one for a second controller. Both use the same map, game type and perks.

2nd Controller
Load up a game for you and the 2nd controller and select Juggernaut and select the The Hideout map. Set the bots to disabled. When the game loads up, pick up the minigun and then stand in the bottom left corner of the map.

Now, pick up your 2nd controller and continue to pick up all the perks and weapons until the Minions perk appears. DO NOT pick these up. Leave these alone - we need two of those to get the achievement.

Look out for the Laser Gun pickup. Once you've got this, use this to clear every green wall/bush on the map.

Once you have cleared all the bushes and have two minion pickups waiting and ready, it's time for the fun. Using your 2nd controller, pickup the first minion pickup in the top left. Immediately head across the top of the map towards the second minion pickup and the first set of 4 should follow you. Once you've picked up the second minion pickup on the right, walk your 8 minions down into the bottom right corner of the screen. They should all follow and then stand with you in that corner.

Pick up your main controller again and simply fire the minigun into that corner and the achievement should pop! It may need a couple of attempts due solely to the sporadic fire of the minigun. But you should eventually be able to blitz 7 in quick succession.


Boosting Partner
Load up an online game for you and your boosting partner and select Juggernaut and select the The Hideout map. Set the bots to disabled. When the game loads up, whichever of you is going for the achievement needs to pick up the minigun and then stand in the bottom left corner of the map.

Have your boosting partner pick up all the perks and weapons until the Minions perk appears. DO NOT pick these up. Leave these alone - we need two of those to get the achievement.

Look out for the Laser Gun pickup. Once your partner has got this, they can use this to clear every green wall/bush on the map.

Once they have cleared all the bushes and have two minion pickups waiting and ready, it's time for the fun. Get your partner to pickup the first minion pickup in the top left. They should immediately head across the top of the map towards the second minion pickup and the first set of 4 should follow them. Once they've picked up the second minion pickup on the right, they should walk their 8 minions down into the bottom right corner of the screen. They should all follow and then stand with them in that corner.

You then simply fire the minigun into that corner and the achievement should pop! It may need a couple of attempts due solely to the sporadic fire of the minigun, but my boosting partner and I got it using this method straight away.

You must kill 7 knights in a row. You have succeeded when you have the word "Extermination! 7 kills" displayed. Minions count as knights, this achievement can be achieved with a second controller by choosing these parameters:
- Difficulty Bots: Disabled
- Game mode: Capture the flag
- Time: 5:00
- Level: First Flag
The principle is to take all the bonuses with your knight so that others appear, until there are two minion bonuses and a kamikaze bonus available on the map. Player 2 gets 8 minions and Player 1 takes the kamikaze bonus to kill everyone. This potentially allows you to do 9 kills in a row.