I am a PC player of the Dark Souls II game. I am already in NG+ and have invaded and killed hundreds of other players. I have huge difficulty performing backstabs. In fact, I have never actually done one. My theory is that a lot of PC players for dark souls 2 use a controller, and there is something specific with the controller controls that allow easy backstabs. You go behind someone and you press a specific button. Usually in a fight, if I show my back even slightly, I get insta-back-stabbed. But when I run behind people and light attack their back, nothing ever happens at all, in a month of gameplay. even mobs. Even a tutorial mob that was facing with its back to me. I just keep regularly attacking it's back even when I am in the perfect angle. So, who plays Dark Souls 2 on PC, and how do you backstab? 

made a video about the problem: <http://www.twitch.tv/surgetheurgegaming/b/537807314>