Mass Effect Legendary Edition

To get this you need to destroy the armor of 25 enemies using the Incinerate ability. Basically you (or a squadmate) needs to cast Incinerate on a enemy with armor (orange bar over their health indicator/their health indicator in some cases) and successfully destroy the armor (deplete that bar) - it does not count if you merely damage the armor but do not fully deplete it. Incinerator ammo does NOT count.

On easier difficulties an Incinerate will destroy most enemy armor in one hit, but if you're playing on Insanity you will want to whittle the armor down to about 25% through other means before casting Incinerate.

You don't need to do it with your own character, you can direct a squadmate to do it - in this case the easiest squadmate to use is Mordin, as he has Incinerate and is one of the first companions you can recruit on Omega. The only other character who can learn Incinerate is Shepard him/herself if made an Engineer or an Infiltrator.

The enemies that most often have armor are various mechs and tougher Collectors. On higher difficulties (Hardcore and Insanity), many Collector Husks will have them too.

There are more than enough enemies with Armor throughout the game so that you don't have to resort to any workarounds, but if for some reason you don't want to keep bringing along a squadmate with Incinerate, you can also find a group of enemies that have Armor (e.g. the Collectors Husk the first time you encounter them on Horizon, if playing on higher difficulties), destroy the armor using Incinerate, reload the save, and repeat until you have 25.

For those running through Insanity or those just looking for a place for easy kills on higher difficulties.

When you reach Illium head to the Baria Frontiers store and purchase the 'Minos Wasteland' Star Chart. The store can be found in the taxi port past the police station.

From here head to: Minos Wasteland > Fortis > Aequitas. upon scanning the planet and finding the anomaly you will be able to begin the mission N7: Abandoned Mine

The mine has 50+ Husks, all of which have very low armour. Load out with Mordin, an Infiltrator/Engineer Shepard, or both. Create a save before entering the mine, then proceed through the mine as normal. Use the Incinerate ability as you progress to burn the armour off the enemies.

I was able to do 25 on Insanity without having to reload, if you make your way through and didn't reach 25, simply reload the save you made before entering and repeat. Progress is not tied to save/load game, so reload as many times as needed.

Note: Husks may only have an armour value on higher difficulties. I tested on Insanity and all Husks has armour, Hardcore will likely be similar. I have not tested lower difficulties.