1997's Quake 2 's engine was more of the same (i.e. still essentially id Tech 2), just with sensible improvements all around, such as using the OpenGL API for rendering, allowing for better ...

In the past, it was id Software's engines that everyone wanted to license. There's a whole generation of games that are based on the Quake II engine, which has now been renamed to id Tech 2.

A Game Built on Cutting-Edge Tech The Quake Engine (id Tech 2) was mind-blowing at the time. With Wolf3D and DOOM, the player character is essentially a floating camera locked to a flat plane.