Gameplay
After completing the game, the player can play a non-canon bonus level, named "Panzerknacker Unleashed", in which the player plays as Lt. Jimmy Patterson, who has been sent to a castle after the Allied Forces received a distress signal from there. Many strange enemies are fought at the castle, including dancing dogs which are armed with machine guns and drive half-tracks, knights carrying battle axes, Zombie soldiers, robotic soldiers and several large nutcrackers, called Panzerknacker. The objective of all of the three missions available in this level is to build your own Panzerknacker, who assists you in the final mission.
Read more about this topic: Medal Of Honor: Underground