What is it that makes this map so incredibly suspenseful and immersive? Is it the gameplay? Monster placement is outstanding, and the enhancements to some of the enemies make them much tougher to deal with - but not gameplay alone. Is it the environmentals? The subdued tones add to the atmosphere of menace, and the subtle but definitely different feel to the architecture adds to the feel, but not that alone. Nor is it layout, which is not confusing, and fairly - though not completely - linear, while quite extensive in the first map. No, it is the brilliant combination of all three that melds into a seamless whole that will grip you from beginning to end.