What are the Shadow Complex difficulty settings?

CASUAL - Intended for the casual gamer or someone who is unfamiliar with Shadow Complex.

NORMAL - Intended for people who play video games regularly.

HARDCORE - Intended for people who play lots of games and enjoy a challenge. Boosts the amount of XP that can be earned.

INSANE - Intended for the Best of the best. There is a major boost to how much XP that can be earned.