With these new technologies game engines featured seamlessly integrated indoor/outdoor environments, used shaders for more realistic animations (characters, water, weather effects, etc.), and generally increased realism. The fact that the GPU performed some of the tasks that were already done by the CPU, and more generally the increasing processing power available, allowed to add realistic physics effects to the games, for example with the inclusion of the Havok physics engine in most video games. Physics had been already added in a video game in 1998 with "", but limited hardware capabilities at the time, and the absence of a middleware like Havok to handle physics had made it a technical and commercial failure.