Continuity mistake: Before the cut scene where the American is in an outhouse, if the American dies in the night before, he will still be shown in the cut scene despite being dead. Similar happens in the cut scene of the American and German asking the Russian where he got the meat that's in the food he just made. All 3 survivors are in the cut scene, even if you had 2 of them die that night.
Continuity mistake: In the opening cutscene, The American is walking up looking around and finds a machine gun on the ground. His eyes are blue here. But a few shots later when he is on the tank and looks up, his eyes are green.