Witch Halloween is a game only for adults with elements of adventure and horror. Sexual scenes are included but not required for choice. It depends of the heroine.

The game takes place on the aunt's estate on the outskirts of the city. It needs to be whole night there surrounded by ghosts and demons. Collecting fragments of her aunt's diary, Chelsea sinks into the world of phobias and erotic fantasies, which sometimes take grotesque forms.

In the game, Chelsea will have the choice to obey, run away or expel the monsters. It will depend on this choice in which condition she leaves the estate in the morning and whether she leaves at all. If Chelsea obeys, the ghost takes possession of her, and in return gives a spell to summon its.

From the moment you progress through the game and in accordance with one choice or another, Chelsea will also be transformed, both consciousness and body.

To receive full adult end Chelsea needs to meet to all ghosts in garden and aunt's house and to collect whole spell (to summon demon)

This spell which consists of few parts is poem of Charles Baudelaire named "The Litany of Satan".