User summary Castle of Heart is an 3D graphics, 2D action platformer, first released for the Nintendo Switch. The player controls a cursed knight that has been transformed into stone, and must run, jump and fight his way to the sorcerer that cursed him. In a sense a classical "travel to the right, and kill all enemies" arcade action game, each level also has five secret crystals to find on each level, and the game promises a nicer ending to the player who finds them all.