To get this achievement you need to reach mission 4 – Bridge Robbery of thieves guild and answer the test correctly.
To see the whole quest you may click here https://tibiatips.com/2021/09/12/the-thieves-guild-quest/ or you can go o the section Tips inside quests.
Dont forget to get your script book inside of the theate.
Ill give you a Tip so you wont fail in this mission!
First of all you gonna tell the npc Percybald:
HI / TEST / YES AND HE WILL SPEAK A RANDOM SENTENCE AND YOU WILL ANSWER THE SENTENCE BY COPYING FROM THE BOOK
EXAMPLE: ( follow the pictures below)
Here you will copy the sentence inside of the book you got on the theater (follow the pictures below)
After you finished your test you will obtain the achievement “Amateur Actor”
Hope you guys enjoyed!