I originally posted this in the normal Halo 5 forum, but it probably belongs better here. I have been having problems with the Harbinger achievement. I finally came back to this game to 100% it, but no matter what I do this is the only achievement that will not unlock. I have done this level on solo legendary three times and even did a run where not a single member of the fire-team died, as well as once in multiplayer. I just wanted to bring this issue to attention. I suspect it has to do with the Firefight update, as I have seen a couple comments around the web of it not working for others recently too. I know a new patch has come out recently, but they did not address any fixes for this in the update. I have not tried again since the new patch since it really is a pain to do this mission and I would like to make certain it works before doing so again. Does anyone know if this has been fixed or if 343 is aware of the issue? Thanks in advance!