Mass Effect 3 achievements

Mass Effect 3

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There are 68 Mass Effect 3 achievements (50 without DLC) worth 2,292 (1,550)

140,046 tracked gamers have this game, 15,054 have completed it (10.75%)

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27,213 tracked gamers have this dlc pack, 13,547 have completed it (49.78%)

There are 9 achievements worth 434 (250)

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Achievement Details

The One and Only in Mass Effect 3

The One and Only105 (50)

Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.

  • Unlocked by 14,035 tracked gamers (52% - TA Ratio = 2.09) 27,213  

Achievement Guide for The One and Only

365,366 (167,696)
Achievement won on 05 Mar 13
TA Score for this game: 2,292
Posted on 05 March 13 at 23:00, Edited on 05 March 13 at 23:13
This solution has 124 positive votes and 0 negative votes. Please log in to vote.
In order to get this achievement you will first need to acquire one gold token to buy "Mirror Match" at the Armax Store.
This is basically playing you against yourself (your Shepard that is) while the enemy Shepards use different classes.

Now before I post the way I did it I guess that Tomjeh's way (as he pointed out in my "Simulated Hero" guide) will makes this quite easy.

It's basically setting the combat difficulty in the options menu to "Narrative", beat waves 1 & 2 and let one enemy live in wave 3.
Now switch the combat difficulty back to "Normal" and kill the last enemy, achievement should pop now.
I didn't do it myself so I can't confirm whether or not this works.


Now to the way I did it:
- Map: Wingman
- Enemy: Mirror Match
- Score Modifier: Enhanced Damage Boost

When the match starts, turn left and run to the far corner on the lowest level.
Position yourself on the very last cover point and your squad mates on the two cover points before you.

I used Garrus and Liara while I was playing Sentinel.
Liara is very good for biotic combos while Garrus is good to get shields down.

The most difficult part is that the enemies tend to rush your place, so you will need to make good use of powers like Overload or Biotic Explosions to stagger them.
Also, it seemed to me like some powers can hit you even behind cover and stagger you, what makes you vulnerable for more biotic attacks which can basically drag you out of cover.
If you keep your head in cover and watch your left and right to not get flanked, this should go quite well.
Usually, the Infiltrator was the last enemy standing so keep an eye for your cloaked clone.

I would also recommend using the M-7 Lancer as it has infinite ammo, so you won't need to run for ammo boxes.
You're not going for points here therefore don't go for the bonus pickups in between waves as that can make your previous position an enemy spawn zone.

That's about it, might take a few tries but I got it on my first try this way.
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