Difficulty is one of the hardest things for a modern game to get right. Because games are catering for a much wider range of players than they were even ten years ago, deciding what level you should pitch your game’s difficulty at is very tricky and potentially very risky. Make it too hard and you’ll alienate the coveted “casual” gamer market that makes up the bulk of game sales these days; too easy, and you’ll piss off the hardcore gamers who are most vocal about their hobby and generate most of a game’s buzz. Either outcome hurts sales, and pleasing both camps is nigh-on impossible. This is why the difficulty setting exists.