Sacred Haven of Debauchery

I started playing Opposing Force, I used to play it, but for some reason, I didn't finish it. It's incredibly hardcore; the enemies survive three shotgun blasts at close range and two revolver shots to the head. It's terrifying; I used everything I had – grenades, bombs, mines, rockets – all the stuff that was mostly used for variety in the original game. But they still kick ass! And that's saying something, considering I'm not exactly a complete noob.