I bugged this in-game the other day after trying to complete it three times over the course of 2 days. I made sure to jot down all the locations that are supposed to be marked and compared them to EQ2i and EQ2 Library (20 locations between Phantom and Tranquil Sea) so that I wouldn't miss any, but no luck. Just wondering if anyone else ran into this issue with the achievement completing?
If I remember correctly (it's been a couple years, during AoM expac being current) you've got a few Points of Interest on the islands which are not marked on the map. Something like that, did you try going by the waypoint list here on Wikia? http://eq2.wikia.com/wiki/Island_Hopping
Yep, that's what I based my points on. Wikia states 20 locations in total split between the two zones, which I visited and marked, but no dice.
Hello Albanara ! I did it with this one : http://eq2library.com/guides/secrets-of-altar-of-malice/ I didn't check if the locations are the same on the 2 "helpers". Hope it can help you !
I did the achievement a few days ago and used the eq2library list. Had no issues getting the achievement. edit: switched the color of the link, realized would be hard to see