Silence on the Line

Silence on the Line is a game played by Markiplier.

Game Information
Silence on the Line is a survival horror game that was developed during Global Game Jam 2013. In the game, the player finds himself on a haunted submarine where he is bing hunted by deadly spirits. The sound of the player’s heart is the only indication that the player has of their impending doom. The faster the heart rate, the more likely it is that the player will die from fright.

Episode

 * Silence on the Line