the prologue was released for some extra enjoyment in the zalgos wrath series.

heres the backstory to the game

In 1943, scientists made machines to help win the war, later on, Russian scientists found zalgos cave in a local village. This was immediatly studied by russian scientist vankov(chapter 1). He was then trapped in the cave(chapter 2). He escaped and was put in a russian asylum after he was captured at the mouth of the cave by the russians(chapter 3). The rest of the story will be revealed.