According to my sources, there are 26 achievements points in total when unlocking creatures in the Bestiary. Here's a list of achievements and their descriptions with the points.
Sources:
https://guildstats.eu/ach-checker?s=1&lang=en
https://tibia.fandom.com/wiki/Achievements
Question related to my answer in How many achievement points can I get for completing my bestiary?
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