It seems there is a rather cool Easter egg awaiting players of Call of Duty: Black Ops 2. With just a little exploration you can find Mjolnir, hammer to the God of Thunder, Thor.
The hammer is on the mission called Celerium. It is hidden away in a cave embedded in a chunk of rock. It appears that nothing can free the hammer but you never know what Treyarch may have in store . No word yet on any other Marvel items lurking about in the game but Black Ops 2 was just released yesterday.
Take a look at the video walkthrough below to see how to find Mjolnir.