One person left mid game so we had to complete it with me and 2 others. and it was such a let down not getting it when we completed it.
Completed Retribution on expert difficulty (NOT all heros mode) did not get spray and or achievement
That is a travesty. You would be better off making a ticket though, as I currently am not an admin (I did apply for OverWatch, however, so maybe will be soon!)
what
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The same thing happened to me too. I completed normal retribution as well and was not rewarded with the spray or the acheivment. Did you ever figure out how to fix the problem?