Halo 3 Odst endure achievement

I think this is a great achievement and a great way to make friends on xbox live. Make sure everyone has a good connection so you don't lag out or you will have to start over. If you need people to play with, just go to youtube and search for "halo 3 odst endure" in the comment section of the first five that come up type in that you need some help and give them your gamer tag. You will have a full room in a couple of minutes. If you suck, don't charge out because you will be costing your team lives, just stay back and help with what you can. I do this on Alpha Site because the enemy must funnel through to get to you and they get caught in the crossfire if you stay in the atrium, two people on each side.Good Luck