Okay, just purchased Call Of Duty: Ghosts for my little bro. It's been done via my gamertag and is being downloaded to the console. Will he have access to and be able to play the game via his gamertag? I'm talking full access to the game even though it was my gamertag and xboxlive account that purchased it. Will he be able to earn achievements, complete story mode, use multiplayer..all from his account and not mine?