Its one of those very rare, excellent short mods (~15 minutes), it has beautiful level design, attention to details to the texturing, pipes, metal lining along the bottom of walls. Unfortunately it provides very little variety, with 2 very small outdoor areas in between the action, and one 2 tight air ducts (one of which had a very nice scripted sequence, THANKS BARNEY!!) this level design didn't feel claustrophobic because there was ample light and grates on the walls to see around. The level design…