A mixture of different sized rooms connected with some very fast elevators, transporters and/or stairs. The main room has some cool look-outs/sniper pill boxes that run around the top edge. To what is becoming commonplace with this author, some great hiding places and I believe some of the best stair design I have seen. The time that it must take to make these stairs. Again, a few texture misalignments, few sounds and few light sets. But, some very fast carnage in spite of it's size. You need a large group for this one.