Mortal Kombat 2
Shao Khan stands on top of a mountain. If that’s not the most badass thing ever, we don’t know what is. Add to that, he also has a stage where he sits between a chained Kano and Sonya Blade while he watches you fight to the death. Still that this is the best boss battle ever? Well, how about mid fight with him, one of his moves is pointing at you and telling you that you’ll lose, even if it means leaving himself totally defenseless. Honestly, there are just too many factors in Shao Khan’s final battle to put him over the top. In the history of fighting games, no boss has ever been cooler or more exciting to lose against. You will die, mortal.