This Seeking Tech guide will explain how you can get the Ancient Sentry trophy in Sly 2 Band of Thieves (2024) on PS5 and PS4.
To unlock this, you will need to do the following: “When not in a job, defeat 3 guards with the tower turret in Episode 3: The Predator Awakes.”
Use the following video as a reference:
For the first step, make sure you complete the Battle the Chopper stage in Episode 3.
Afterwards, return to the tower where the chopper crashed.
You then need to defeat three enemies with the turret to unlock this trophy.