halo 3 Marathon Man achievement help?

[ionath]

i'm playing halo 3 and have accessed all terminals, but still don't get marathon man achievement. do i have to do it all in one shot without exiting the game or something? what am i doing wrong?

 

[Mitch B.]

Hi,

I think my clan might be able to help you. We play halo 3 and alot of people will be willing to help you


Read Here: http://thedogzclan.com/viewtopic.php?f=5t=3
Someone will contact you.

Hope to see you around .

Mitch