It is a GSC script preprocessor for modders, for every Call of Duty which are using GSCs. A full description can be found here: moddb.com/tutorials/pregsc...
The war that changed the world rages on, with 13 all-new single-player missions, 11 new multiplayer maps, and more intense action than ever before.
Award-winning developer Gray Matter Interactive Studios follows up on the success of Infinity Ward's Call of Duty - winner of over 80 Game of the year and 50 Editors' Choice Awards worldwide - with Call of Duty: United Offensive. This next chapter in the Call of Duty franchise raises the brand's trademark cinematic intensity to new heights with over 13 new single-player levels, plus an enhanced multiplayer experience featuring new maps and 3 new modes of play.
Players will look once again through the eyes of American, British and Russian soldiers, as they are thrust alongside their squad mates into more authentic action across Fortress Europe’s most historic battlefields - this time with new weather and pyrotechnic effects, character abilities such as sprinting and cooking-off grenades, and weapons including flamethrowers and portable machine guns.
Go online for the ultimate battle between Axis and Allied powers, now including tank vs. tank combat as well as tank-and-foot-solider combined arms action.