As the title says,
My group and I have been farming Imperial City for a good couple o' hours, and yet neither of us have gotten the achievement for killing the "Patrolling Horrors", and only few managed to get the achievement for killing the Trove Scamp.
We did a little bit of testing, and it seems to be the person who gets the killing blow, who also gets credit for their respective achievements. Naturally we cannot 100% confirm that this is the case, but we're pretty darn sure after we've killed every Patrolling Horror at least twice, and it only ever seems to be a single person who gets the credit for the kill.
We all get loot from the boss, but not credit towards the achievement. If this is really the case, then this should be fixed rather swiftly - because it sure has wasted our time.
Leader of Bloodlines
-- EU --
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