sentences:  A limitation of this is that not all such controllers provide the same range of inputs as a Sixaxis/DualShock 3 controller (fewer buttons or joysticks for example), so may not be practical in all games.When any such controller is used with games which require sixaxis functionality or the use of the analog buttons usability is also limited.Many PlayStation 2 games which were programmed to use the analog functionality of the PlayStation 2 controllers buttons will not accept non-analog input therefore Sixaxis or DualShock 3 controllers must be used (though this could potentially be solved with future firmware updates).