Here's an easy one for you Battlefield 3 fans out there. This is the achievement 'Twofor', and it's the easiest 15G, or bronze trophy you could ever get. Load up the level Night Shift, and you'll see two guards standing right next to each other. All you need to do is take them both out with one shot. It's that easy!
Now if you'll excuse me, I'm off to steal candy from a baby. Because that's what getting this achievement is like.