Metro 2033
48 Achievements
1,240
20-25h
Stunning
Get 25 kills with alternative fire of Volt Driver.
20
How to unlock the Stunning achievement in Metro 2033 - Definitive Guide
Here you can work towards all other X kills achievements too.
If Done correctly, you should see a spark come out of the gun as you shock the enemy.
You can easily get this achievement on "Cursed Station",
go grab the bomb on the right side and plant it up by the top area (up the stairs), then run to the left side... but don't plant the bomb instead wait at the end for 3 Nosalies every 10 secs or so... keep killing until you get your achievement, then reload your checkpoint and work on the next weapon achievement. :D
NOTE: The Volt Driver must still be "Charged" in order to do this.
[Hold RB, Tap RT]
On a side note, the Volt Driver is an air-gun for all practical purposes (uses the air gun ammo, needs to be pumped)...other than for the other achievement to kill 25 humans with air guns. In that case it is not an air gun.
The Volt Driver is the second new weapon in the DLC, and it can be found in a few locations through Metro. The first location is in the Lost Tunnels, on an ammo bag near the campfire in the first room full of bandits (it's important that you get it here). You will also find it on the bed next to the heavy auto shotgun (you can only choose one, and I recommend you choose that), and you'll find it a third time in Sparta base on the weapon rack.
The gun's power is based on its charge, which you must increase in a similar fashion to the NVGs or flashlight, but in this case you need to hold and tap to charge. This is very important to get the secondary fire kills needed for stunning (press to do a melee shock attack - aim for the head), and can mean the difference between one-shot kills and 0 damage. I recommend using only the Volt Driver until you reach the auto shotgun in Armory.
Farming kills - When you're outside of Cursed Station and you need to blow up the tunnel and the escalator entrance, park yourself at the top of the escalator for an infinite stream of enemies, so long as you don't block off the entrance. Because they appear in groups, I would recommend getting Stunning done prior to this, and using the primary here as it is safer against groups.