the title says it all the fire fight moder is unbelievable i mean holy -blam!-! when you play that mode and btw it comes on a seprate disc that campain and multiplayer are 2 diff discs. but if you havnt already seen the fire fight moder go check it out on youtube either copy the link below or type in halo 3 odst fire fight and click on the second vid :)
http://www.youtube.com/watch?v=s-A_toRN294