Invasion 1944 is a historically accurate World War Two total conversion mod for ARMA 2: Combined Operations(ARMA2 + Arrowhead) centering on the European theater.
I'm giving it a five out of ten. Not because it's a terrible game, but because I have no idea how to even get it installed. After three hours of looking all over every which way on the internet I have yet to find HOW to install it. Basically unless you have the steam version you cannot play this mod, period. It looked fun, but after three hours I honestly can't say that I care anymore.