I am a game artist and i usually work with blender and unity3d.
I use rigify for rigging character and use the add-on script from this video to export a fbx file and import into unity.
[![IMAGE ALT TEXT HERE](http://img.youtube.com/vi/YTGYFA0GQwo/0.jpg)](http://www.youtube.com/watch?v=YTGYFA0GQwo)
This script is very useful as it turn a rigify rig to unity mecanim rig by one click, and also it have a function for exporting fbx file which removes all unneeded parts of models made with rigify. I think it is very helpful for artist.
But I find that this add-ons only support the **old rig** of rigify, and blender **remove (or change?) the old rig in 2.79 Test builds.** : (
I hope Blender can keep the old rig in 2.79 and future version.
Or I hope blender can add a and fbx exporter and game/unity mecanim compatible rig option for rigify.
I love using blender and rigify to build models and animating character for games,
so i hope it can be considered.
(sorry for my english if it feel weird)