I don't know the original author of this map but since it seems to be popular I'll add a copy here. If someone know where it came from please let me know.
Good for 3-8 people in closed arena allowing plenty of "dodge & cover" while playing.
but I know where it came from: Forge House. http://www.nextforcesw.com/marathon/
This is easily one of my least favorite maps. While the design isn't too terrible, the weapon balance and placement is just ridiculous. Shotguns are the only weapons on this map that are worth anything and you can only find them in 3 spots. 2 of them are right next to each other in a huge open area, and the other is hidden away in a corner.
If there are no real good players in the game, it's probably not a problem. But, if there is at least one good player, he will easily be able to camp around the shotgun spawns and one-shot anyone that tries to get near him since it is a very open map and there is a clear line of sight to pretty much every part of the map. The person will never have to leave this location, since there are unlimited shotgun shells here.
Don't host this unless you want the good player in the game to completely dominate everyone else.