- last post: 01.01.0001 12:00 AM PDT
Yes there is, but you have to get the skull on... I forgot what level but if you google,
"Halo 2 Skulls" it should give you websites that list them and look for the skull named mystic or something with an "M." It's not really another difficulty, but when you get the skull it just makes enemies more aware of where you are, stronger shields, and stronger weapons.