Works on steamdeck after using the touchscreen to set the controls to Gamepad.

Before starting New Game, select Options > Input Method > Gamepad.

Be warned, this game has no cloud saves. Deleting the game to save space will delete your profile and expansion slots. If you purchased the Overlord DLC bundle, use the Raising Hell launcher instead of the base game. If you play the base game then install the DLC later, your gamesave will not transfer.