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?
Question Revival V contestMarch 17, 2024
Interview with Solkrin - lead of the Customer Support team at CipSoftDecember 20, 2023
Become a TibiaQA Supporter!May 09, 2023