If Wolfenstein 3D is the Grandfather of all First Person Shooters DOOM II is the Super Dad. A Large collection of DOOM and DOOM II WAD files comprises Demon Gate which was compiled by downloading add-ons off of the internet and then marketed to retail for those who did not have an internet connection. The disc comes with a utilitly called EasyWAD to help sort through all of the files. Play all 666 New Levels Now.