So basically;“We really thought about it hard. On Normal you’ll be able to power your way through the game or shoot your way through the game, but when you try Hardcore or Insanity, you’re not going to be able to do that any more,†lead designer Preston Watamaniuk told OXM.
So basically;
Normal = Easy
Hard = Normal
Insane = Hard
How exactly is it that the 'normal' difficulty lets you just ignore all the game mechanics and faceroll the game, that's just stupid.