Summon the city of the Tattered King, one tile at a time! Use your cultists to control leylines, conduct rituals and influence the districts of Carcosa itself. If they displease you, you can sacrifice them to the dark waters of Lake Hali for the pleasure of the King.

Each player leads a Lovecraftian Cult. They take turns, their Prophet selects a tile representing a part of Carcosa and adds it to a ethereal landscape of ritual sites, leylines, towers and domes. Players can then deploy Cultists to control a leyline, conduct a ritual or influence the districts they have summoned.

But Carcosa is no normal city! Tiles must be stabilised with power drawn from leylines or they may be reshaped by other cults! New cultists may be recruited by performing the Forbidden Play at theatres you reveal! Watch as your cultists are driven mad by the power they desire! Imbue ritual stones, then expend them on game-changing spells! Sacrifice your Cultists to the horrific Avatars of the King!

The game ends when a Cult completes the Summoning of the King Himself or when enough of Carcosa has been summoned that it becomes a permanent feature of our Earth. Only one Cult can succeed in these insane tasks - but in Lovecraft’s mythos, can one truly call that winning?