button while in game to display the
Gamepad Mapping controls or long-press the NVIDIA 
button and access the Gamepad Mapper 
from the SHIELD Power Menu.Gamepad Mapper dramatically expands your library of Android games by adding controller support to native touchscreen games, making everything from NBA JAM to Angry Birds playable on the SHIELD portable's console-grade controller. NVIDIA provides default Gamepad Mapper profiles for hundreds of top Android games, which are automatically downloaded from the cloud so you can just launch your game and play. Use NVIDIA's default profile, or create your own custom profile and share it with the community.
When a Mapper game is launched, a message is displayed stating that Gamepad Mapper is activated.
A full list of Android games supported by Gamepad Mapper can be found at:
http://shield.nvidia.com/android-game-list/.
To access Gamepad Mapper, long-press the Start button while in game to display the
Gamepad Mapping controls or long-press the NVIDIA
button and access the Gamepad Mapper
from the SHIELD Power Menu.
Use the Back 
button to exit Gamepad
Mapper and back to the game. You can also touch the 
button above the trash can on the Gamepad Mapper screen.
To see a description of
each function, click on the individual icon in the image below.
