Here is a redesign of the Charger from Left 4 dead 2, made in 3d as a mod. The armature and animations are from the original game and do not belong to me (exept the animation from which I got the first image here).
I designed this creature by using the proportions of the original as a base to make it easier to be integrated in the game. I made the sculpting, retopology, textures, and then skinning on the original rig !