Slender

The game was created by Mark J. Hadley, known on YouTube (and on the Unity forums) as AgentParsec.[2] The original design document for the game, originally called Slender Man The Game was posted on the Unity forums on the 5th of May[3], and the first beta version on the 26th June.[4]
A number of influences for the game have been acknowledged. In addition to the Slender Man character, the movement rules for Slender Man resemble those for the "unintentionally creepy" movement of the player's companion Watson in Sherlock Holmes: Nemesis[5], where a similar algorithm was used to enable Watson (a friendly character) to appear to be following the player without needing to implement pathfinding or walking animation for him. The gameplay and some aspects of the artistic style of the game are also extremely similar to a prototype game named "Hide" that was posted on the Super Friendship Club gaming forum in 2011, although the movement of the enemies in Hide is different and the player can view them from a distance without harm. [6][7][8] Many of the game's graphics and code snippets are obtained from Unity's own Asset Store, the defaults included with Unity, or from contributors on the Unity Forum thread for the game [3].
After the game's release, several other games were released that were based on Slender: The Eight Pages, usually based on exploration mechanics with similar AI for the enemy. The most popular games based on Slender: The Eight Pages are Slenderman's Shadow which was released in several maps[9] and "Slender-Man" for iOS, which reached number two in worldwide app ratings, being outsold only by Bad Piggies. Several mods were also released.[10] A more advanced version of the game implemented using the Source engine was originally announced named Slender: Source but this attracted criticism as Hadley was not involved in the development of the game. In response to this, Slender: Source was renamed Faceless.
In Version 0.9.4 there is an unlockable "Daytime