Mass Effect

It is an unlockable skill for the following: Engineer, Sentinel.
Simply cast 75 times and you'll get this achievement, and you don´t even need a target.

To use overload, you must be an Engineer or Sentinel class character.

To activate Overload, press RB and A to select it while aiming at an enemy. It must be your character that does this, ordering your squad mates to do it does not count.

To do this quickly, you can actually target the transport consoles around the Citadel or the Mako if you're out in the field.

If you want to do a different method or a lazy method in getting this achievement and you don't want to do the long, boring, normal grind for this achievement. Then pull out your turbo controller and do the following:

- pick a class that has or have this skill obtainable
- when you have this skill available to use, go to a place that is safe (away from enemies)
- during normal gameplay hold the "RB" button
- highlight "Overload" then press "X" (Map Skill) to assign it to your "RB" button
- let go of the "RB" button
- set the "RB" button on turbo on your controller
- rubber band the "RB" button down
- then watch TV, go on the internet, go to sleep, go to the bathroom, go eat, or go to the bathroom and eat.

You can just let your turbo controller and rubber band to cast and recast the skill for you. In the mean while do your chores, do your fun homework, or go to work and come back later to get your cheevo!

Happy boosting!

For those who didn't play engineer, this is one way to try: just start a new game on casual and level up until you unlock the five engineer powers (namely neural shock, ai hacking, damping, overload, and sabotage).

Then, go downstairs in Feros across from the Varren pack there is a room with Geth protecting some Krogan. Save, then go in, there will be two geth slightly above you, cast AI hacking on one, then sabotage on the other, wait a little and a flying turret will attack, cast overload and run forward, another geth will appear. Shoot down his shield and cast damping, then run past him into the next room and cast neural shock on a Krogan. Rinse and repeat.

This should net you all five achievements with the shortest amount of reloads.

Note, the last one I needed to get was neural shock, which doesn't seem to work on Geth. Just turn around and use it on the Varren pack at that point so you won't have to keep fighting through the geth to get to the Krogans.