Hanging at a rather wonky angle on a rather wonky wall in a haunted house representing the world of idiosyncratic RPGs is Costume Quest 2, a buoyant sequel and an irreverent Double Fine-branded romp through the wide-eyed fantastical landscape of a child’s mind; one that’s half lovingly and half contemptuously firing spitballs at the RPG tropes that make up the game’s mechanics.