I just finished that questline with all those undeads / vampires on the island far in the south east. Quest is listed as completed but the achievement was not unlocked.

 

I did the quest as follows:

 

1. Discovered that island

2. had no quest pointing me to the island

3. went from the "docks" straight to the left area

4. from there on  i head north to the crypt

5. shortly after i entered that crypt i got the "Ghosts Paradise" Quest

6. i cleared the area

7. i opened the gate with the blood of the two vampires

8. i confronted the "boss", talked to him  until he attacked me

9. killed him

10. quest was marked as completed -> but no achievement

11. i destroyed that red magic orb

Greetings,

 

Thank you for taking the time and notifying us regarding this issue I do believe this to be fixed in the most recent patch 1.1. Should you have any additional questions let us know!

 

Cheers.

Thanks for reply!

Just one question: is the fix retroactive or would I have to redo  the Quest in a new Game with 1.1?

Nope, it's not retroactive. Just loaded one of my Savegames -> still no achievement.

 

Looks like you have to do the quest AFTER the 1.1 update. So no blessing points for my new game + from this one, heh?