Unfortunattly i think you are mistaken!!! on the menu of xbox live in the halo reach game it says playlist and you can choose your playlist
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To get to grifball on Halo Reach, first go to matchmaking mode. From there click on the playlist tab and find "Action Sack" from there you will be able to select grifball.
u cant
no you cant
You cant, your destined to die in a firey ball of planet
you cant there are just the primary weapons you have and find until you die