id Tech is a video game development company known for creating popular game engines, particularly the id Tech 1 engine used in the classic game Doom. Founded in 1991 by John Carmack and John Romero, the company has been influential in the first-person shooter genre and has contributed to advancements in 3D graphics technology. Over the years, id Tech has released several iterations of its game engines, including id Tech 4 used in Doom 3 and id Tech 5 for Rage. The engines are widely used by developers for their powerful capabilities and have helped shape the gaming industry by enabling more immersive and visually stunning experiences.