Space build Maps

How is it that People can make it so if your off a planet your stats go down/ Is it part of Hammer or do i need to script it? Or a good tut for space build map making.

Its part of the gamemode.

Oh Pretty Thanks If anyone knows anything else. Shoot me a link, Please.

Yes but thats not for Space build 3 thats the old way.
We need the new way that workd for sb3.