The Old City: Leviathan

In The Old City: Leviathan players have the option to simply walk from start to finish, but the real meat of the game lies in the hidden nooks and crannies of the world; in secret areas, behind closed doors, and in a 30,000 word novella that reveals itself as the game progresses, up to five hours long in its own right, The Old City: Leviathan is the first part of a larger story. Source: The Game Website.