Halo: Reach

I found this to be kind of a pain in the butt. For the record, it does not have to be 10 at a time, but rather just 10 over time. I tried over and over to get it so here is what I wound up doing:

Go into firefight, put it on normal, choose a mode, I chose the grunt one and picked corvette as the location. I then went into the game options, changed the Spartan health to invincible, the ammo to unlimited. I went into the loadout and made my loadout a needler so that I didn't have to bother picking one up. I went also went into the wave option, and changed the grunts to elites. The reason I changed to elites is I found it too easy to kill grunts with the needler without using the explosion.

Once into the game, pick an elite and shoot him with a burst that will just about kill him. If you shot enough needles, they will blow up and a pink star appears on the left of your screen for a few seconds. That star indicates that you got him with the explosion. Pick another elite and repeat, they don't even have to be close to each other. 10 of those stars show up over time, and the achievement pops.

I tried a few ways to get this on some endless grunt modes, and it didn't seem to pop even after scoring 50k or a million with a needler as my primary weapon.

Hope this helps clarify things for someone!

I found this quite easy to do in Firefight (normal or harder).

Go to the settings and choose Weapons and Damage and make the following changes.

Damage Modifier: unchanged
Melee Modifier: unchanged
Primary Weapon: Needle Rifle
Secondary Weapon: Needler
Starting Equipment: Jet Pack
Infinite Ammo: Bottomless Clip (Crucial: No reloading!)
Equipment Usage: Unlimited

Back out to the Game Options Menu and choose Spartan Settings. Ignore the options here -- they won't matter -- and choose the Base Traits Menu.

Choose Shields and Health and makes the following changes:
Damage Resistance: Invulnerable
Immune to Headshots: Enabled
Immune to Assassination: Enabled

Personally, I like to set the waves on just elites. To do so, simply go under Game Options, choose Firefight Settings and Wave Properties and change these settings for Round 1, 2 and 3 Round Properties. For each Wave, Initial, Main and Boss, change these settings:
Uses Dropship: Enabled
Squad Selection Order: Ordered
All Squads 1-5: Elites


With invulnerable health, a needler, and unlimited ammo, you'll get this achievement in no time!

You can this in either campaign or firefight.

I did it in campaign, using both the needler and needle rifle both count as long as you get a combine explosion medal. If you are using the needle rifle dont aim for the head cos you'll kill them without a combine explosion.

In campaign it has to be at least on normal difficulty and you have to do it all in one life, dying resets the counter.

I made a game type for this called "Needler". I did it in Firefight with normal difficulty and on Waterfront. http://www.bungie.net/stats/reach/fileshare.aspx?player=chio...

Hit the Chieftain with LB to break his shields and then just hold down the LT to shoot him until he blows up. Repeat until you blow up 10 of them and get the achievement.

I made a video guide, just watch the video and it will take you through a quick and easy way of unlocking this achievement in single player firefight.

You just need to find a needler rifle (not the regular needler) shoot an enemy with it about 4 times then it should explode. You have to do this 10 times to get the achievement. Try to aim at their body or legs.. if you shoot them aiming at the head you might accidentally headshot them before they explode.

I found the best way to do this was load up a game of firefight on any map and then change the settings to infite ammo, also change one of the weapons you start with to the needler and the when u see an enemy just press and hold shoot and you well get a upercombine explosion very easly.

this achievement its very easy, i did it on firefight unlimited life's change the load out to needler gun and rifle, took me less than a minute, don't worry about dying, since i forgot to set up as invulnerable and also did not change the legendary difficulty, died several time, and still got the achievement.

Easiest possible way to do this: go to a Firefight game from the Main Menu (not Multiplayer Matchmaking), go to options, set the first weapon in your loadout to be the Needler and set all weapons to bottomless clip. Go in and just spam the trigger until you get the achievement.