This map was created by me. It was made on forge island and is a floating map similar to the cage in halo reach. I based this map idea off a map i made in halo reach, but the two maps are no where near the same. I've also added some fake cranes, turrets, and terminals for looks only
http://www.halowaypoint.com/en-us/players/blackvenomballz/halo4/fileshare#!/?section=GameMap&view-select=Tile&startIndex=0&details=da970851-fe06-4611-a707-2c63b17d81f5
Download link
Also I have a game type as well or you can just disable custom classes