Kinect Adventures

Just like the other solutions mention, you just need someone to stand in an Adventure with you and the achievement will pop as soon as Kinect detects that person.

But Beavis, you ask, what if you live far away from family and friends and all of your neighbors speak spanish? Well, my friend, there is another way...

You can very easily trick Kinect into thinking that you have someone standing next to you. You just have to show it something that looks like a person. I used a scuba wetsuit and it worked like a charm, but I think you could very easily rig something with a long sleeve shirt and a pair of pants on a couple of hangers. If you happen to live in the north and own pajamas with feet or if you are a lumberjack and own full body thermal underwear, both would probably do the job.

Make sure that Kinect recognizes you and has your profile active and then introduce it to your new friend. When I did this, Kinect gave control of the menus to my wetsuit, so I had to hold out the arm and use it to navigate to my next Adventure.

I have also heard that people's dogs sometimes trigger the achievement, so it is possible that any significant movement away from your body will also do the trick, but I have not tried this myself.

Good luck!

once u are in a game by yourself just have another player join ur game in the the same house u are in and bleep bloop achevement hoped this helped!!!

I just got out my vacuum cleaner and put a mask and a santa hat on it and this cheevo popped.
i lol'ed when this happend. the kinect is easily fooled