That's why it is scary, Eiffel! Anyway, I finished the game at highest difficulty level unlocked (not nightmare!) and it's pretty easy compared to hardest level of FarCry, simply because you can save wherever you want to. Anyway, I don't think nightmare level is that realistic as your health drops to 25% slowly after you get a health pack. Also, the final 'boss' wasn't as difficult as the 'medium sized bossed' you come across in the middle. But, it was a freakingly scary game. I think I'm a fearless freak after playing it. I played it in the mid-night too; not on the first day, but 3rd and 4th. Took me only 5 days to finish the game.