Here you can post all about the UDK.
Aviable for Download .
The UDK was made by Epic Games in 2009 and gets sometimes a Update.
With this tool, you can create YOUR OWN Game, and if you buy a license, you can sell your game and get a lot of money for this...Only If it´s good of course.
The UDK uses the Unreal Engine 3 and you get all Tools, what you need to create professional games.
Here 2 examples for that, what you can create:
Maybe you´ll find here help for your map´s.
Okay i need help with: Creating Weather in the Zone and "writing" text in the HUD.