This is a WIP that will be updated
First you need to add BigBox.exe to your GeForce Shield options.
On your Pi run the following:
sudo sh -c 'echo "deb http://archive.itimmer.nl/raspbian/moonlight stretch main" >> /etc/apt/sources.list' sudo wget http://archive.itimmer.nl/itimmer.gpg sudo apt-key add itimmer.gpg sudo apt-get update sudo apt-get -y install moonlight-embedded
https://github.com/irtimmer/moonlight-embedded/wiki/Packages
sudo sh -c 'echo "[PACKAGE]" >> /etc/apt/sources.list'
Then to pair and run BigBox:
moonlight pair 192.168.1.XXX moonlight stream -app BigBox 192.168.1.XXX