Here is my Mech Neck Walker design with an animation control menu for the Blender Game Engine.

**There are three scenes.**
*1. Test_Ground scene:*

The scene where everything happens.
Contains the camera control and the grouped Mech_Neck scene.
*2. Mech_Neck scene:*

Contains my animated model for editing.
I made this scene because it is a very complex object with many parts and so I wanted to have it separate from the main scene.
*3. Animation_Menu scene:*

Overlay scene for the mouse input to change the animation and the animation speed.
Feel free to use this as a template for your own animated models :)