At the beginning of the last level, Halo, normally you just walk forward along the cliff, right?

Well, if you turn around and go behind the pelican, there will be a bunch of extra weapons.

There's battle rifles, shotguns, fuel rod guns, SMGs, and grenades, and I'm pretty sure assault rifles too.

This might be useful cause you automatically start with the assault rifle and rocket launcher which aren't that efficient against the Flood.

Enjoy!