First, are you talking about the "old" Red Orchestra, or the "new" Red Orchestra:Heroes of Stalingrad? Your post is in the "old" Red Orchestra: Ostfront 41-45 forums. I suspect you have the "new" one, popularly referred to as RO2. The large download is probably the patches that have occurred since the game was first released. Good luck, and welcome to Red Orchestra! TWB*SlowBull