ModX is a mod that allows the players to "map". After you have finished creating whatever your desire is, you have the opportunity to have "base mode" or weapons mode, if you're not into weapons at the moment, there is also a built in snowboard in the mod along with "foot ball." This mod is great for those who have a real great imagination, an imagination you can put to life!
I introduce you a very old game called, Star Siege Tribes. In this game, there was a mod called ModX, a mod where you build your stuff in here. And here are the first 5 buildings I'm about to show you.
Music: Combat Arms theme loop(NOT MINE!) I do not own it, but I have it on my computer since downloaded the game, which I found the song in the files. So I thought it might sound nice for the game. Hehe.