Destiny

DISCLAIMER:- This isn't a guide as such as more of an observation.

So from what I've seen this achievement is semi-glitched the achievement description isn't completely accurate. From all the people i've spoken to who have unlocked this it has only unlocked through using a super ability and getting three kills that way, well at least for a warlock and titan not completely sure about a hunter.

EDITED for posterity: Apparently you can get this achievement as long as it's in the "triple down" time limit which being a Bungie game, I assume is within 4 seconds of each other.

So what I noticed when trying to go for it, is that it HAS to be a triple down or more. I got all 3 kills within one life on rumble, but it never seemed to pop. What I did was go play Control (This is what I recommend playing) and I was lucky enough to have 4 enemy players on one flag. I used my Super and got all 4, which was a hunter, warlock and titan. My achievement didn't pop straight away, I had to sign out and sign back in again (I hate that Glitch) and it was there. Anyway here is my video guide for it showing how I did it. Enjoy!

Play 'Control' on the map 'Shores of time' behind capture point 'A' in the cave there is some rocks you can hide behind, to make sure you dont appear on motion tracker, stay crouched behind the rocks 'only once you have your super move ready to use, in this case i used Titan's super. Wait until you get 3 or more enemy players capturing this point, you can walk up whilst crouched to check, and once ready unleash your super attack... Fingers crossed there is one of each class. When i discovered this it took 2 attempts and on my second i killed a full team of six 'achievement unlocked' hope this helps.

PLAY RUMBLE!!!!!! Have a party of "3" Make sure you have one Warlock, Hunter, and Titan. Now everyone assemble on a part of the map so you 3 meet up. Press the start button at the beginning of the game and go to roster scroll over the name and find out what class the other 3 people are. If you are a titan you need to kill a titan and then your two friends. Same for any class. You can also try sending a party invite to the other 3 randoms and see if one will help out.

This is not so much of a guide as just a helpful hint.

I know there is a lot of talk about this being misleading, glitched or whatever else. However I can CONFIRM that I just unlocked this achievement by KILLING 2 Hunters and a Warlock, and ASSISTING a Titan kill, only using my auto rifle, sniper and a grenade. No special was used. And this was all over the space of about 2-3 minutes without dying.

**Notes:
*I recorded my clip with GameDVR and watched it afterwards. I definitely did not get a Triple Down, in fact I didn't even get a Double Down.
*I also looked up all the names of the players that I killed or assisted in that life on Bungie.net, which allows me to see what class they use, hence how I know what I killed and what I assisted.
*This occurred in my first life of the game (Not sure if this makes a difference or not, but it meant I hadn't died all game when I unlocked it)
*This occurred in a Clash playlist. Again, not sure if this helped trigger it or not, just trying to provide all the details to help others out.
*This proves that Assists count towards the achievement.

For some people this may be glitched and they may have to get it other ways. But this is how I got the achievement, so I'm sure it's possible for others.

If you are going for this legit (i.e. no boosting) then I advise playing as either a Titan (Striker class) or a Warlock (Voidwalker class).

Playing on control or salvage is the way to go primarily because you can adequately deduce enemy locations based on the capture points.

Using a Titan/Warlock's supercharge move basically makes these classes a 1-hit murdering machine. When that is ready, all you need is a bit o' luck regarding who exactly is taking control of a specified point (Is it at least 3 people? Are the different classes? etc etc)

I got this on salvage with my Titan - came in from above with my super while the other team huddled around the relic. They did not see me coming .

And I will confirm: you need to get these 3 kills done in succession - within ~4 seconds of one another (i.e. a "Triple" kill). Anything less (as I figured out multiple times) will not net you this achievement.

If you are running a hunter, don't bother with this achievement - it will most likely frustrate the hell out of you. Don't get me wrong - the hunter is my absolute favorite class, and the bladedancer subclass is the best for crowd control, but if you are not fast enough with the super you will just get annoyed chasing this dream.

For example: I was using my bladedancer on Control, and had 4 enemies at point C on earth. I thought "Hell's yeah, bitches! Prepare to get shanked!"

They saw me, and instead of firing they scattered. I got two of them (Titan and Hunter) and as I chased down one of the Warlock's, that tool decides he would rather glide out to his death then fall to my blade. Like an idiot, I tried to chase him off the cliff, and died as well.

So, a word to the wise: just go with the Fist of Havoc or Nova Bomb - it is much, much more difficult for enemies to run from those moves.

Questions, corrections and neg vote justifications below.

Not very hard, but it requires some amount of luck.
The description is misleading, however.
In order to get this achievement, you have to kill all three classes in a triple Down. (Three kills within four seconds of eachother.) However, it does not need to be in one hit. You are able to kill the classes seperately so long as it's within a Triple Down. This is easiest to do on Control. Wait until the opposing team is trying to capture your objective, and unleash your super on them. Warlock can do this easily, but Hunter and titan players will have to get up close.
if the achievement doesn't pop on your first triple Down, keep trying. You can get 5-6 Super attacks in a single control match, but be careful not to waste them.

I didn't get a Triple Down medal when I got this but the kills were within a few seconds of each other. I've posted a link to the kills that got me the achievement (but it didn't actually pop in the video).

I got a decent number of triple kills before getting this achievement and I got almost all of them while playing control. My recommendation for this is to use your super when the enemy team is taking over a control point (the B points typically seem to be the most contested ones) and go on a rampage. Good timing and a bit of luck get you this achievement.

I did this on Twilight Gap on Control. At Point B enemies can only approach from the front but can enter the point from the front and sides. Using the Defender subclass of the Titan, drop a shield in the center of the capture point and cap it. Then hope that a group rushes you. The shield gives you extra armor while inside. Melee anyone who steps in and use a gun to kill anyone approaching. Just make sure you back into the shield after each attack. Use the radar to determine which direction new opponents are coming from. I got six guys in a row using melee and my fusion rifle when the achievement popped. Still a bit of luck involved but it's doable.

If you need this achievement still or any other non-quest related multiplayer achievement, you can boost it in private matches.

Get 3 other people for this and make sure they are all different classes. Make a rumble match. Now just find each other and take them all out quickly by any means necessary. Grenades work well or just use a shotgun or anything you have that can kill them fast.

Thanks to the new Rison of Iron update this can easily be boosted by setting up a Private Rumble, invite 3 additional friends with different classes and blow them up with a grenade. Easy.

Ok, just for some clarity from my session I held. Not sure if this is the most efficient way but it will take approximately 20-30mins for 4 people.

This achievement can be obtained with a minimum of 4 gamer tags obviously all running different classes. The two that are the same class can get the achievement in the same game. So if you all have multiple classes you can get this done in 2 games with 4 people.

I tried this in multiple private rumble games with 4 separate accounts. This DID NOT unlock the achievement.

I then tried it in crucible matchmaking last option on the right of screen called iron supremacy which is a 6 player free for all game type. We were searching in matchmaking at 10:30 BST (London) GMT

Luckily no one else was playing at the time so we managed to match all accounts into same game with 4 out of 6. This seemed to be the minimum to load the game. You can see how many guardians are matched on screen. Make sure you are all communicating via chat to make it happen, if not back out and search again.

Basically in game all group up in one area, we used any corner that was available, backed 3 different classes into the corner then used a grenade initially in the middle of the group and finished any surviviors with melees. You should get a triple down message if you managee to string the kills together. The other gamer tag with the same class can then swap. Rinse and repeat in next game.

We did finish the 10 min game to be double sure the game was registered.

My final word of advice is be roughly the same level as one of the accounts was level 12 and would not matchmake at first with levels 40 40 and 29. Luckily they had the spark of light item that boosted them to 40, after visiting tower and activating inventory item. I believe you get this for free as part of the legendary collection.

Also like many other games the achievement did not unlock straight away, I had to sign in under another account in the game and then sign back in under the initial account. Obviously after the game had finished.

It did unlock straight away for 2 out of 4 people.

Hope this helps!