15 Hidden Video Game Bosses You Never Knew Existed

Bosses are often the highlight of any game, but some are harder to find than others. But these optional bosses are not only rewarding to find, they’re rewarding to defeat. Here are the 15 secret video game bosses you never knew existed.

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Karstaag: Skyrim

Find Karstaag’s skull and place it on his forgotten throne and you will summon the ghost of the mighty frost giant. The ruins shake and rumble as he tears his way out of the ether. But once he’s out he isn’t too keen on going back. And that’s where you come in. His attacks seem similar to those of standard frost giants, but they pack quite the punch. He earns his title as one of the game’s hardest bosses.