To own the full version permanently, you can purchase it from these verified storefronts: Pizza Connection 3 on Steam
Legitimate free access is generally limited to specific versions or temporary events: Pizza Connection 3 Free Download
Note that the game includes a "Free Game Mode" (a sandbox mode), but this is a feature within the paid game, not a separate free download of the full title. Official Purchase & Download Platforms To own the full version permanently, you can