You may think that you play Diablo III, clicking on enemies and looting bodies, but there's a good chance you're actually playing a kiddie version of the game.
At the game's higher difficulty levels, it opens up into something far more difficult and engaging than its borderline Facebook-game-level normal difficulty. And at Inferno, Diablo III's highest difficulty, the game becomes a nonstop adreanaline rush of near-death, where the tiniest enemy can lay your character low.
(Or, like, so I've heard. I'm still in the kiddie pool.)
If you want to make the game even harder core, you can play Inferno difficulty on "hardcore" mode, where if your character dies a single time, he or she is dead forever and you lose all of your gear and progress. As we saw last week, losing a high-level character on hardcore mode… well, it sucks.