Scenario Description:
There are 2 main bases, positioned across the level from eachother. The only way to reach each base is by way of the mountain's cavern. The cavern has its own 3 floor outpost, complete with power weapons to defend the cavern and control the level from the inside. In CTF, a tank traveling through the cavern will be vulnerable to the power weapons of the cavern outpost. Each main base has its own 'outpost' about 100 yards away. The base's outposts can be used to defend intruders from the cavern. However, each base's outpost has an underground structure too; which leads to the bottom of their respective bases, meaning a double threat for flag steals. There are 7 structures in all:

2 bases, 2 base outposts, 2 underground areas, and a cavern outpost.

I've never played this with anyone but I can bet it would be fun playing Capture The Flag with 16 players. It works with all gametypes; including Race, Slayer, King Of The Hill, Oddball, etc.

I've included images of the level at the bottom of this post. If you want to modify the level, you may download my Subterrene Game Asset file. Technical Note: Due to the sheer size of this project, I didn't have time to appply 'cluster' geometry around certain areas. This means that the Halo Game Engine may have to render more than 10,000 triangles at a time, and that means the level may 'slow down' in frame rate a little on less powerful computers. I recommend a 1.7GHZ processor or higher. Someday, when I have time, I'll fix that issue, re-upload the file here, and it will run smooth on all machines.

The MAP cache file is all that is needed in order to actually play the level; no need for complicated installation. Simply extract the archive, and copy/paste the 'subterrene.map' to your local Halo CE Custom Edition install directory, in the 'maps' folder. Then start up Halo CE Custom Edition and the map will appear in the list of available multiplayer maps to play.