I've notice this happening more and more frequently where I sneak up to a Nano's back and the context assassination won't pop up. I'll even move around them while there back is turned and it just won't pop up no matter how close I am or what angle, so no matter what all it will allow me to do is melee.

I even had a sniper I snuck up behind and I swear to god I was trying to get the context assassination to pop up for nearly 2 full in game minutes until I just gave up and just regular melee him in the back.

I don't remember having any difficulty like this a couple weeks ago. In fact it was almost too easy to get it to pop up. Use to be where it would pop up if you went anywhere past the side profile of a Nano while facing them and close enough.

Bty I'm on the 360.

I've always had this problem on the PS3. I'm just surprised at all the people that get over 6 stealth kills in one match.

Had no problems with Stealth kills on PC, such like this. Only the infinite health bug after sliding and SK-ing an enemy, or the fact, that the message pops-up to stealth kill, but the game throws a melee attack instead.

Stealth kills are pretty easy to do on PC.

Just making sure: You ARE cloaking, right? You must be cloaked in other for the Stealth Kill prompt to appear.