9 Intense Video Game Secret Levels You Can't Handle

6. Mile High Club (Veteran) - Call Of Duty : Modern Warfare 4

An oldie but a goodie, Mile High Club unlocks once you've beaten the main campaign in Modern Warfare.

Though that means it's not necessarily too tough a thing to get through, beating it on Veteran difficulty has become a right of passage. Not to mention it's the only way COD fans will accept you've gotten through it at all.

With a time limit that quite literally means every shot counts and every movement must be planned and executed to perfection, inside this one minute run you must take out a group of terrorists and nail one final shot on a hostage-taker, saving the day and escaping out the airlock.

Tips include not bothering to heal as it takes too much time, constantly moving forward and even exploiting the A.I. a tad to let your companions' accuracy do some of the heavy lifting.

Who knows - their lucky shots might just be the decider on whether you live or die.