I made this map in the past few days. Had an idea and went with it. Let me know what you think.
Your main base is easy to hold as there are cliffs around the entrance for you to defense up. There are two expansions on the top and bottom and two more on the sides although the sides are only accessible from a drop ship. In the middle there is an expansion that has extra gas and gems but it is very hard to hold as there are 4 ramps to cliffs around it.
Change Log
April 24th 2010, Saturday - I'm a moron and forgot to switch all the players on the forces tab to against each other. Switched and uploaded new version.
April 27th 2010, Tuesday - I am indeed a moron and now made it so you can Ally Victory as well.