There are plugins for all of these features needed on Vita only games. DS4vita, or DS3vita add tilt controls for PSTV users, there is also a way to swap front and back touch pad, so if the game uses the back touchpad, you can move it to the front (Which works with the DS4 touchpad using DS4vita.
It's worth mentioning that the tilt controls are calibrated a little odd when using the DS#vita plugins, so you have to tilt the controller up a little for it to seem level. not perfect, but very functional.
There is also a camera plugin called "fakecamera" that works for games like uncharted, where you have to hold the camera up to the light.
If I recall the camera plugin both emulates the camera signal (without it, the game freezes or something as there is no camera for it to communicate with) and can also grab a picture stored on the vita and use the picture as if it were receiving that image from the camera.
with the two plugins I think only tearaway becomes hard to play because of it's extensive camera usage.