If you are looking specifically for the v0.5.616 build, this was a highly specific update released on the game's experimental branch. According to the Steam Community Announcement, this specific build introduced massive overhauls to the game's creature AI, including:

: You will miss out on critical bug fixes and performance patches deployed by the developers. 🚀 How to Play Legally and Safely

: According to the Osiris: New Dawn Wikipedia Page , the game may also be available for direct download via the official Fenix Fire website. 🎮 About Experimental Version v0.5.616