5. Slender

Slender is a free first person survival horror game based around the urban legend of the Slenderman, a tall, faceless, suit wearing individual who makes a habit of abducting children. In the middle of a dark wood, you have to collect 8 cryptic notes explaining the true terror of the Slenderman, before succumbing to his horror. It is a chilling game with incredible atmosphere that greatly succeeds in furthering the terror spread by the urban legend.