Build 25 predates the modern Steam integration for many users. Originally, the game was sold via Desura. If you are looking specifically for Build 25, you are often looking for an archived file.
Because the game is in active development, older builds are not the default. You can access Build 25 through Steam's beta branch system: : Right-click on Project Zomboid . project zomboid build 25 download
Steam allows developers to keep older versions of the game available via the "Betas" tab. Build 25 predates the modern Steam integration for
