Here is an idea that I've had that is up for adoption. If you need any information regarding the map, message me on Xbox Live and I'll try my best to help you get a better understanding. The map was orginally intended to be for Big Team Battle games, but I imagine would also work well with Invasion. The main feature would be the defensive base, but most of the action would take place in the center. Here are some videos: YouTube - Halo E3 2000 Trailer: Full Trailer Skip to 4:15 for the structure that would be the defending base. Only the outside would be used, and of course some elaboration would be required so it's not just a large, unfunctional building. A top would need to be added, and maybe an outpost or two nearby. YouTube - Halo Before Halo Another video to show the architecture that would be included in the map. The challenging part would be to add a good attacking base. I would suggest adding a few buildings near the attacking side and create a small outpost as the base of operations for the attackers. I know the idea is vauge, but I think, if properly done, it would be a great map.