On Halo 3 is there a way I can get the online achievments without going online?

[WhyAskWhy...]

I do have an Xbox Live account but I don't have an internet fast enough to support it... So I have hundreds of achievements that I can't claim because they're "online achievements"... The other day my friend got Mongoose Mowdown when playing against me and a couple others, not online. Is there a way I can get some, if not all of the achievements meant for online?
FYI-Mongoose Mowdown is an online achievement...

 

[Ozzy]

nope sorry man, back when i didnt have Xbox Live i just got the online achievemnets online

 

[joseph b]

nope sorry bro..but u might be that lucky guy that find a glitch by mistake and get all the achivments for the game..you never know.....good luck