halo.bungie.org

They're Random, Baby!

TIPS HOME
CONTACT

Halo Xbox tip details

Keep your marines living [Halo Map]

On the second level (Halo) where the rock slide is there is about 6 marines who should follow you to where the other marines are sniping bring the warthog up with you with a marine in the gunner seat and park him between the tree and rock and he will take care of any Covie who comes up behind you (this is if you want to keep marines living).
bungie.org