By the way, my dad bought Doom 2 when I was 10 years old back in the 1990s. (We also later got Doom 1 episode 1 as a mail-in promotion with it. I think it was shareware anyways). I remember that I figured out the cheat codes as a kid and would love to go invincible with IDDQD and use IDCLIP to run through the level and wakeup all of the monsters then once them duke it out with each other. The monster in-fighting was a great mechanic.