RaT Design Division was started back in August 1998 by Leros (aka Stiltman), and started modding for the game Total Annihilation.
had some good releases there and was running a couple of years, later on interest died out so RaT that only had the founder Stiltman left
from the start until now, RaTDD has been involved and worked on several mods for different games.
One of which is the IMMORTAL mod for the game Brigade E5: New Jagged Union,
otherwise there has been a lot of WIP and not that much released.
At the moment RaT works mostly on Armed Assault 2 modding and addon making and is using the tags STI_, RDD_.
As of sometime 2010 Stiltman (STI) got involved with Nick (ExA) and started to help him get his
awesome hmmwv updates into arma 1 and 2 as part of the ExA Hmmwv pack.
This cooperation has continued to today and the newly released RG-31 (20121130) for ArmA 2 and is still ongoing with plans of more mrap vehicles for ArmA 1, 2, 3 and VBS 2.
Stiltman is currently also working with Swedish Army Mod at SAMStudios.se bringing the Swedish forces to ArmA 2.
What the future will bring is uncertain, but RaT will probably continue its work with game modding.