 The entry  dialogical logic  gives a fuller account of Lorenzen’s games and a number of more recent variants. In its present form (January 2013) it sidesteps Lorenzen’s claims about justifying logics. Instead it describes the games as providing semantics for the logics (a point that Lorenzen would surely have agreed with), and adds that for understanding the differences between logics it can be helpful to compare their semantics. 