Please re-word the achievement solution for Kill Stealer because it is very misleading. I was under the impression you could set up a local match with a second controller to earn this since you stated in your guide you could set up a local match with another player, which from my observations, you cannot. You can only do this online, as I'm sure you know. A little frustrated now since I may be stuck with this game from GameFly longer than I anticipated as I try to find a booster.
I haven't looked at the rest of your guide yet since I wanted to get the multiplayer out of the way first, but I'm sure it's fine.