Doom II, DOS, 1995 - 100% Level 30, Icon of Sin

Doom II Playthrough, Level 30 - Icon of Sin
A level a day for the month of October!
Ultra-Violence
NOTE: You can't actually get 100% kills here since the final boss keeps spawning monsters endlessly (and the longer it goes on, the worse it gets).
100% Kills (Well... 83%)
100% Items
100% Secrets