The first FPS I ever dabbled in was Wolfenstein 3D back in 1992. My friend came home a PC trade show with a stack of discs including The Secret of Monkey Island, Hugo's House of Horrors, and id's pioneering FPS. Pretty sure we were glued to his Tandy for months after that released, and the addiction overcame us all over again when we got our hands on Spear of Destiny.