Wróg u bram: Stalingrad 1942 (Enemy at the gates) - 2-player game simulating one of the most interesting episodes of WWII. This game depends strongly on a card playing mechanism. There are three types of cards: Commanders (most important), Units, and HQ Cards. Commanders determine strength and size of your corps. They also determine your ability to play and modify HQ Cards. Units consist of infantry, artillery and armored units. HQ Cards are responsible for modifying battle results and the overall game situation - kind of special cards.