Most games nowadays make you feel comfortable; they tend to overwhelm you with tutorials and hold your hand throughout the first few hours. Without a doubt, more complex video games can definitely benefit from an in-depth explanation, but is it really necessary to teach a player how to move, look up, or open a door? Some games, like Eat Lead: The Return of Matt Hazard, even make fun of such basic tutorials.
Then there are games on the opposite end of the spectrum, games that challenge your skills, smarts, and reflexes, forcing you to earn the satisfying sensation of success by learning everything from first-hand experience. They're not always fair -- in fact, in most instances, they're the opposite -- but that's the whole appeal.
It is thanks to these games that the term "Nintendo Hard" exists, but it is often used to describe the difficulty of older titles, like Battletoads or Contra. Modern games, for better or for worse, are rarely so challenging. There is, however, a less notorious term for defining the difficulty of more recent games, and that is "Masocore," a portmonteau of "masochist" and "hardcore," both of which perfectly characterize the games on this list. These games are either extremely challenging by default or don't have an adjustable difficulty setting at all.
If you are tired of simple, straightforward games and crave a true challenge, then click over to the next page to view the first out of 5 extremely difficult modern games, in no particular order.