Relinquish your deepest, darkest Doom-related sins and secrets and purify your spirit. Stuff that you do, don't do, have done, haven't done, controversial opinions you have etc that you're a little ashamed of or just afraid to mention because of the flaming backlash that might ensue.
Here goes... I have never been bothered to defeat the Icon of Sin and therefore officially complete Doom 2. This is a big one.
There's a plethora of widely-praised community WADs that I've n