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 ...

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.