My mythic map pack code does not work, it says it is invalid and I have checked it over several times.

Was the code revealed when you got it out of the packet?

Ive sent Microsoft a email about this problem, I to had this problem it said I have already got this content and its invalid.

 

Unhappy!

could be if you have the game early then maybe MS have not updated the servers to dish out the mythic map pack???

Fingers crossed you get it sorted quickly!

With most LE dlc in the past they dont tend to activate the codes until launch day and sometimes they screw up entirely and dont activate them for a few days.

No Map Pack code works yet (mine does not work too), cause it isn't on marcetplace until 27th Febr. :-) Just wait ... ;-)

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... Just another german Halo-Fanboy ;)

Atm i'm on with tech support at microsoft trying to sort it out

More Information: It said my code was invalid

EDIT: I have to return it too the store :( 
The second time I tried it said it was used

Rocksolid8:Atm i'm on with tech support at microsoft trying to sort it out

More Information: It said my code was invalid

Probably just a technical error in the Microsoft system.

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I stand proud and dominant in the heat of a battle.