Got it off Steam because it was a dollar. Still prefer Doom 1 & 2 over this version. Still better than Doom 3, I beat it a long time ago, never obtained all the keys for the Unmaker.
yes i'm using Save states because this game is stupid hard. A being (depending on the writer) has done Universal+ level feats is weaker than a Rubber Ducky in this game.
Rubber Ducky > Goku > Dora The Explore > THIS Silver Surfer