Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General how to 2 controller and split screen

You need to have created at least 2 game profiles. After starting the game with one controller, load a save (where there are at least 2 characters in the party) or start a new game and load into character creation, then press the Start/Options key on the second controller and choose a profile.