No they are not lost when you prestige.
No you don't lose your emblems and titles
to get titles and emblems on modern warfare 2, you have to complete the challenges in the barracks, but for some you have to prestige
Yes you lose everything but titles and emblems
You do lose your guns, but you do not lose your killstreaks, titles, or emblems.
No, everything is reset with the exception of your titles and emblems.
By getting into a tenth prestige lobby.
All titles and emblems you have unlocked and anything you have unlocked with prestige tokens.
All titles and emblems you have unlocked and anything you have unlocked with prestige tokens.
Because, you will actually gain more titles, emblems, and challenges. Why not?
New titles and emblems. not much else.
no everything is reset except titles and emblems
no it'll erase your game