This is a STALKER Shadow of Chernobyl Total Conversion mod. The goal is to create a world as rich as the lore of Warhammer 40,000, complete with original story line, authentic weapons, and remaking of the general gameplay, although the engine will remain intact... because, admit it, x-ray is just an awesome game engine.
Just working on the Space Marine armour and, ultimately, the Chaos Space Marine Armour. Once the basic form is finished, you will see the models diverge into 2 separate entities. One, a warrior of the Imperium, and the other, the Grandest Traitor to Mankind.