Here is a spider with some animations I made 2011 as a playable character in a little game-project for exploring the Blender Game Engine.
Blender Game Engine demo video: https://www.youtube.com/watch?v=CnT4A9DwXeE
Controllable spider for Blender Game Engine Download: http://www.blendswap.com/blends/view/26798
Animations:
Attack
Walk (forward, backward, right, left)
Run (forward, backward, right, left)
Idle
Jump
Fall/Fly
Die animation 1
Die animation 2
Tested in Unreal Engine 4: https://www.youtube.com/watch?v=3894Z0r1zFM
Tested in Unity 5: https://www.youtube.com/watch?v=cfeBIAhTCJg