The Wolfenstein games generally see the player taking on the Nazi regime, so it probably shouldn't be all that much of a surprise that Adolf Hitler would put in an appearance at some point in the game. However, few expected to fight him directly and even fewer expected him to turn up in a nearly impenetrable mechanised suit while packing a pair of chain-guns. The encounter still stands as one of the greatest boss battles in gaming history, as the player is tasked with chipping away Hitler's armour before leaving him in a pile of bloody mush on the floor. As the final boss battle of the game it is both astounding and truly WTF worthy.