Some Achievements are still unknown and their existence is only confirmed based on the counter that appears on the official website. Currently, there are 189 Secret Achievements (SA), 3 of which are unknown. This page's aim is to list them according to their release date and provide a useful start point for those trying new ideas.

For lists of things tried by players, check Talk:Achievements. There are also useful information on the Achievements Thread and on a similar thread on GuildStats' forum.

Update Added SA Unknown SA Unknown IDs Notes
Summer Update 2010 (8.60) 45 1 36 Achievements were first implemented with this update.
Winter Update 2010 (8.70) 32 1 195 Some minor quests and World Quests were implemented.
Summer Update 2020 (12.40) 2 1 513 Release of the Soul War Quest, The Order of the Lion Quest and An Ancient Feud mission of the Grimvale Quest.