First time through, misunderstood the sliders. Set help off. Had to give up just after the lifts.
Second time through, sliders set to medium. Successful completion.
Third time through, sliders maxed. Successful completion.
Fourth time through, sliders on medium. 'Tested' the maps and made a few fun vids.
Fifth time through, tried HardCorps. Got to the U4 Labs and died. Missed quick save too much to try again
In 15 years of playing FPS's, I've only replayed two games more than this and one of those was "Doom" when there was nothing else on the market.
Bring on Ep. 2