You know, I loved COD:WAW. It was the first truly visceral World War Two based FPS I'd ever played, and I think it did a great job at demonstrating some of the horrors of war.
I felt a chill as I burned my enemies to death with the flamethrower, and they writhed in pain, screaming as I hurried to shoot them, to end their pain. I felt the rush of furious combat as I charged with a bayonet. I saw my comrades not just dead, but mutilated, charred or with limbs missing, and even watched as a young private in the Red Army had his head brutally blown off. It was engaging in a way that, for me, the previous Call of Duty games simply weren't.