A series of courtyards, connected by stone passageways. Very castle-looking. Fantastic attention to detail, especially in the lighting category (although sounds seem to have been neglected). For big groups, this provides a nice balance of open space and tight corridors, with just enough entrances to give someone an out if he's getting shot badly. (For smaller groups, you might be hunting for someone to kill.) Weapons and ammo are segregated... you'll most likely be using the same weapon until you're killed.