As far as I know, there hasn't been a really great feeling First Person game for iOS yet... everything is always crippled by the lack of physical joysticks and buttons. (Correct me if I'm wrong on this.) I was thinking about how this could be overcome. You could require a physical controller for your game, but then you guarantee that nobody plays it. I was thinking about how the Wii had only a single joystick but managed to have amazing First Person games on it. I think a lot of people thought of this and have tried using motion to replicate it. But that never works well because of the motion drift. You need to regularly zero it again. The Wii didn't have that problem though - you never needed to zero it. Because it didn't use the accelerator or gyroscope for aiming - it used the IR sensor + sensor bar for that. That was always absolute - there was never any drift. iOS has a similar sensor - the camera. Has anyone tried doing this? Is it possible to use the camera to track motion and use it for aiming in a game? Can anyone think of a reason it wouldn't work? I figured maybe so it has something to specifiically track, I could have it so the game asks you to build your own sensor bar - just a piece of paper with a bold red circle taped to something in front of you. Or am I all wrong on this? Does motion drift no longer exist? If that isn't an issue, why are there still no good first person games on iOS? Or did I miss those?