Debug Mode Project Zomboid ((free)) -

Debug Mode in Project Zomboid is a game setting that enables players to access various developer tools and cheats. When enabled, players can use console commands to manipulate the game world, spawn items, and even control NPCs. This mode is primarily intended for developers and testers to identify and fix bugs, but it's also been made available to players.

If you purchased the game directly from the Project Zomboid website or GOG: debug mode project zomboid