Dwarf Rig
The Dwarf Rig is a game ready rig with one joint chain, created with a dual skeleton set-up. The rig features IK/FK switching arms and legs, both with parent space controls, and a full joint-based facial rig.
The model is sourced from the Game Character Rigging Fundamentals by Winston Powell on Pluralsight.
Below is a video demonstrating the rig.