- last post: 01.01.0001 12:00 AM PDT
To link your Gamertag, go to this page. Make sure you are signed into Windows Live; the same ID you use to get onto Bungie.net. When you are linking your Gamertag, you will need the following:
Gamertag
Name of credit card holder on the Live account.
The last 4 digits of the credit card.
The phone number.
The postal code.
When you're done with that, click "use Halo 2 Emblem", as RedPhoenix said.