As the player collects pages, the fog in the forest grows thicker and Slender Man appears closer to the player character, though the sprinting speed slowly increases as well. The game over screen shows Slender Man's 'face' up close and blinking static pulses.

Or if Slender Man comes into contact with the player, which will turn you around and end the game. A game over occurs when either the sanity drops below a certain point (measured inversely by the intensity of the static and the volume of the noise) Sprinting allows the player to move faster than jogging, but doing so will decrease the maximum stamina available for jogging and sprinting. This also results in the ability to sprint for a short period of time. A disturbing and shocking sting is played if the Slender Man appears on screen suddenly and close to the player. When he does, and is visible on screen, sanity will start to decrease, the speed of which depends on the distance to him and whether the light is on. Slender Man occasionally appears in the player's field of vision. The player character has the ability to jog, which will tire out the player if done for too long. The player is equipped with only a flashlight to see through the dark it has limited battery life and will eventually shut down permanently if left on for an extended period of time. Slender Man will also teleport itself at will, even when being observed by the player.

The player's objective is to collect eight pages located in various areas of the forest while avoiding the Slender Man, a faceless humanoid entity resembling a tuxedo mannequin with tentacle like appendages sprouting from its back which appear when the player collects the fourth page. Slender: The Eight Pages is set in the middle of a forest during the night and is played from a first person perspective. The game is based on the fakeloric figure known as Slender Man, who is known for the abduction of children in mysterious, dark settings. Slender: The Eight Pages, originally known simply as Slender, is a free download indie-developed first-person survival horror video game released in June 2012 as a beta for Microsoft Windows and OS X, utilizing the Unity engine.

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