I'm a casual achievement hunter.. looking for the elusive achievements.. I own all of my games. I can't/won't list all the games I have ever played (way too many) I won't list WP games either.
I'm always down to help and get Multiplayer achievements, especially the ones I need. I am also more than willing to help you out, even if I have the achievement you want, but I expect the favor returned. You can message me with what you would like to work on or boost and I will get back to you and if your so inclined come join me at:
[Link]
gamertagnation.com its a great new site that tracks your Xbox and Ps achievements..and trophies.