Hey <p>Hey there, TibiaWiki admin here.
There here.<br><br>There are several IDs which have been skipped by CipSoft for some reason. Maybe they were placeholders for achievements they eventually decided to not implement, maybe they did it on purpose for some other reason. Either way, this is why there are several IDs with unassigned achievements, but most of them don't really exist.
As exist.<br><br>As of today there are 3 Unknown Secret achievements in Tibia, of which 2 are "old" (from 2010) and one from the Summer Update 2020. You can keep track of that information here: https://tibia.fandom.com/wiki/Achievements/Unknownhttps://tibia.fandom.com/wiki/Achievements/Unknown</p><p>Edit (Nov/2021): With the discovery of <a rel="nofollow" href="https://tibia.fandom.com/wiki/Unlikely_Pathfinder">Unlikely Pathfinder</a>, there are only 2 Unknown Achievements left.</p>