Help with Halo 3 legendary online co-op?

[Joseph]

Can somone help me with the whole game of halo 3 online co-op on legendary i will help get all skulls im good at the game and i hope for you to be to my gamertag is BlAcK stainED message me on there or answer this question if you will help with the whole campaign thanks

 

[THANATOS]

I would be glad to help u pass the campaign on legendary I'll send you a friend request and then just tell me when do you want to play