I have been playing Gmod for a bit now and was thinking to my self why not try out the Source SDK and make a new map that has every think I like in it.
That was a good idea and I did (as best I could :D) and I come up with gm_jdconstruct it is a basic build/construct map
1, Deepwater (boat ramp)
3, Construct area
4, Underground room
5, Aboveground building that can be used as a base
I will add more and there will be another version out when I get around to making the train tracks and more underground and above ground rooms.
Screenshots: Thumbnails click for bigger pics