 The Serious Engine is very efficient, capable of maintaining dozens of moving enemies (often stampedes) and enormous enemies, even on a modest system challenging the well known id Tech, Unreal Engine or Source engines.The "Serious Engine" can render through both Direct3D or OpenGL and, while it does not support pixel or vertex shaders, it is optimised for Direct3D 7's hardware transformation, clipping and lighting.The "Serious Engine" is available for licensing from Croteam.