Star Realms has gone insane! Ducing Cthulhu Realms! Are you zany enough to play the crazier and creepier cousin of Star Realms? Download and play today to find out why Cthulhu Realms is so crazily addictive! In Cthulhu Realms, each player tries to drive their opponent insane or have more sanity than their opponents when the deck runs out.