The AI of NPCs evolved into a state of full awareness of what's going on a battlefield. Animation of snow, smoke, and rain is thoroughly rendered in the game. Instead, they focused on a sequel bringing back the best features of the first game and adding even more realism of WWII thanks to the improved technology of the IW 2.0 engine. Following a groundbreaking release of the original Call of Duty and subsequent acclaim, the team of developers decided not to be complacent. This is the second chapter of the world-known first-person shooter CoD series made by Infinity Ward.
