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This is a good Gmod map by Shadow801.Its based in a huge area with a complex directly in the middle of it, this large area is perfect for building extremely long/large contraptions or huge NPC wars and NPC'S will use tactics in this map due to it being AI compatible. The complex has three areas, the "black room" which is totally black and is perfect for posing without any background distractions and the "phasing" room, the room has a phasing effect which makes it look like it is disappearing which is good for unusual "nightmare" poses and there is the "submarine bay" and outside it there is an area for building your submarine and then shoving it through the force field which will take it into the deadly water which you will drown in if you don't have any proper protection.This map is great for building and it is pretty well textured, the author plans to make another version of the map which will feature more items and spawners.