User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-5515807-20130306190549/@comment-5150860-20130307031103

They could put in a goddamn difficulty system. Casual which in cludes easy enemies with no full sync. Medium with kind of difficult enemies and no full sync and Hardcore which includes 2 option Hard with or without full sync and it should include really hard enemies.

I would be playing Hard without full sync and in my second playthrough Hard with full sync.