For the achievement Never Seen That Before, you need to kill one of the listed unique enemies. For the achievement Special Snowflakes, you need to kill 15 of these same listed unique enemies. For the achievement A Unique Collection, you need to kill all of these listed unique enemies. Where are they usually found (what zones, and in what general directions/areas within those zones)? Do some spawn more predictably than others?
Diablo – Where do the enemies for the unique enethe achievements spawn
achievementsdiablo-3
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Best Answer
There are 82 of these and they are all found randomly. I've added all the ones that I've confirmed personally to start with plus those listed on the Diablo 3 database that I've verified on other sites. For the sake of completeness and simplicity, I'm posting this as a community wiki post so that people can add what they find:
Act I
Act II
Act III
Act IV
If you edit the lists above, please note the specific area and sub-area where you found them.