: Newer DLCs and save files may not be compatible with this older version. To avoid automatic updates, it is recommended to launch the game in Steam's Offline Mode or copy the files to a separate directory. Guide: How to download older versions of a game on Steam
: Look up the Planet Zoo (App ID 703080) on SteamDB and find the Manifest ID associated with version 1.2.5. Download Planet Zoo v1.2.5.63260
Since this specific build is an older version, you must use the and SteamDB to fetch the original files. : Newer DLCs and save files may not
: Once finished, Steam will provide a path (usually SteamApps\content ) w2.5 files are stored. You can run the game directly from its .exe file in that folder. Download Planet Zoo v1.2.5.63260