Every game runs on an engine that either makes or breaks the concepts that the developers set out to accomplish during the months leading up to launch. Each of these engines has a different objective, whether it's making the sexiest game out there, or creating one of the most realistic physics systems for all those ragdoll-powered moments of glory. Whether you're trying to create the most amazingly lit landscape seen in gaming yet, or if you're going for unique concepts that can only be delivered on the most versatile of video game engines, you can't go wrong with any of the following gaming engines.