There's hardly a longer-standing tradition in video gaming than the boss. You know how it works--you plow through wave after wave of lesser enemies, cutting them down with your sword or mowing through them with your machine gun, until you finally reach the big bad dude at the end of the level. Bosses come in all shapes and sizes, but they're always a lot harder to kill than the typical enemy (well, almost always). Boss battles are often the most interesting--and most frustrating--part of any game that involves some kind of combat.

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