There is no glitch.
No, there is not.
There are no glitches, cheats or workarounds to earn all the achievements in Halo 3 illegitimately.
THey get you an achievement, and they get you the Hayabusa helmet.
yes
No such thing they patched in since halo 2
You get an achievement. that's pretty much it.
you need to get 1000+ achievement points from halo 3
Halo 3 has several glitches. Go on YouTube and search for CMNeir's channel. He run a show called Halo 3 Tricks, so you'll find all the glitches there.
in the achievement were in for some chop on halo 3 you do not get scout shoulders, sorry
Nope. Sorry.
U can't! :(