" ONI RECORDS INDICATE THAT YOU HAVE NOT YET PLAYED THIS GAME
Head over to the Store to grab a copy of this game. Once you have your marching orders you’ll be ready to gear up and charge into battle! "
However I have already played to halo 3 and since 2011, I don’t understand why ! (same thing to halo reach)
Can someone help me please 
If you have recently changed your gamertag, tht could be by it’s not syncing up correctly. Try loading up the game and playing a match, or campaign or somthing. Should hopefully sync everyting back up for you again.
You’re right, I have recently changed my gamertag but it seems very curious cause it makes me this just with halo 3 and reach’s records not with halo 4.
I gonna try. Thx for the advise.
Ok it fixes but in halo reach, my armor is still default.
The armor wont change anymore on site so what you have is what itll be from now on.