Id Tech 5

id Tech 5 is a proprietary game engine developed by id Software. It followed its predecessors, id Tech 1, 2, 3 and 4, all of which had subsequently been published under the GNU General Public License. It was seen as a major advancement over id Tech 4. The engine was first demonstrated at the WWDC 2007 by John D. Carmack on an eight-core computer; however, the demo used only a single core with single-threaded OpenGL implementation running on a 512 MB 7000 class Quadro video card. id Tech 5 was first used in the video game Rage, followed by Wolfenstein: The New Order, The Evil Within and Wolfenstein: The Old Blood. It was followed up by id Tech 6.