'Forging a Legend' Achievement doesn't appear.

Hi there,

I’ve just completed the Halo 5 campaign on legendary solo, and the achievement hasn’t appeared to show that I have done so. When I look at my service record for the campaign, it shows that I have completed the game on legendary, so the game has clearly registered that I have done so. I even ran through the last past of the last mission twice, but the achievement is nowhere to be seen.

Has anybody got any idea of how to fix this, and has anybody else had any similar issues?

Before anyone asks, I am connected to the internet!

Thanks in advance!

I am having a similar issue. However, I was beating the campaign while the console was offline. Once I reconnected the console, all achievements I beat during offline play where unlocked as it is supposed to be (other games as well). Except of “Forging the Legend” and “Lone Wolf”, although, my service record (both ingame and on halowaypoint) shows full completion.

Replaying a random mission didn’t do the trick.

Any other suggestions than “do it again and hope for the best”?