I am having trouble getting the achievement “harbringer” and i have completed it solo legendary and coop legendary without my friends or me dying. Can the AI die? Can i go down and be revived? Because im struggling here.
If the AI die you will not get the achievement…
Try with trueachievements guides… 
Also try youtube
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> If the AI die you will not get the achievement…
> Try with trueachievements guides…
That’s were I go for all the campaign achievement tips and walkthroughs. Excellent site… trueachievements.com