Game Rig Tools addon - game ready rigs in seconds
A common problem with Blender rigs is that they don't export well to Game Engines (or to any other 3d tool for that matter).
Some parts of a Blender rig - such as IK and other controls, constraints, and drivers - are simply impossible to export.
Only the Deform bones can be exported reliably but even that is not completely straightforward. I made a series of videos about dealing with these export problems. Here is the playlist youtube.com/playlist
An addon developer (Blenderboi) helped me automate these workflows and turn them into a nice addon. It's available to everyone. Grab it here: