A mostly enclosed, tight-hallwayed map. (There's open space, too, but the dominant type is closed-in.) A few minor glitches, but mainly pretty nice mapmaking. Flow is good-there are multiple exits from most areas, and you won't get hung up on edges too much. Effort has been put into lighting, which (because of the mostly small spaces) shouldn't affect framerates. (The map could use a bit of sound, though...) Comes in two flavors-heavy on the weapons and ammo, for large groups, and lighter on both, for smaller groups.