Some Achievements are still unknown and their existence is only confirmed based on the counter that appears on the official website. Currently, there are 186 Secret Achievements (SA), 4 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.
|Update||Implemented SA||Unknown SA||Unknown IDs||Notes|
|Summer Update 2010 (8.6)||45||1||36||Achievements were first implemented with this update.|
|Autumn Patch 2010 (8.62)||32||1||122||A batch of achievements was implemented.|
|Winter Update 2010 (8.7)||32||1||195||Some minor quests and World Quests were implemented.|
|Summer Update 2011 (9.1)||11||1||216 or 220||Introduction of World Changes and implementation of the following Unobtainable Items: Babel Swimmer, Golden Scorpion Pendant, Armageddon Plans and Small Whistle.|