Traumläufer is a 3D puzzle Game, currently in development by 5 Students from Germany.  The rig was built using XSI using the MindThink Springtools from Helge Mathee which are just great. The Rig consists of 2 character keysets (one for the hands) and a second constrained rig for exporting the animation to ogre3D Engine. For the "horns" I implemented a spring simulation and a finer control because we found that they communicate emotions very well, if it’s not busy hunting the player down.