Support Pico4 controllers ?
And, Can I play games in steamVR theater mod with this?
No, this software is designed to work using VR controllers as a Lightgun on flatscreen, it is not working inside the headset. maybe "theoretically" if you are able to calibrate the virtual theatre screen using the controller toutching the 4 corners of the screen in virtual reality it maybe work... but I don't think you can do it precisely... maybe in passtrough mode, idk.