There are a lot of setting add-ons that you can pick up, and most of them are fairly inexpensive. The setting is designed for a darker feel than most D&D (Forgotten Realms, Eberron, etc.), but it's not like playing Midnight. However, the add-on for their religions is fairly dark, especially when you discover the relationship between their gods, fey, and devils (not demons...those are something different). Also, this is a setting where humans created orcs to be their slave (warrior) race...and it went great until recently...