I maxed my weekly crucible marks yesterday yet I haven't received the achievement.
There's been a problem with other achievements not being paid until the console is restarted as well. However I have turned the console off and left it over night only to still not get the achievement this morning.
Please help
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Microsoft has said that achievements can take up to a week to unlock on XBOX LIVE. Some players have been able to get around this by logging out of XBOX LIVE, launching the game, then logging in when the game prompts you to.