The horror gaming genre has evolved a great deal in the last few decades, and it's taken many different forms. Horror games have gone from simple text-based adventures to fixed-camera survival horror to third-person action games, and a whole lot in between. That constant evolution has meant that the definition of a horror game is rather loose, but it usually boils down to any game that puts a primary focus on scaring the player, through eerie environments, intense music, spooky monster design, or any combination of the three.