Steam’s ‘Deal of the Day‘ is Nancy Drew: The Haunting of Castle Malloy. Touted as the most romantic event to grace the ruined halls of Ireland’s Castle Malloy, the Simmons-Mallory wedding was supposed to be a fairytale beginning, but now the groom is missing? Did a banshee crash the wedding or is this a case of cold feet? Can you, as Nancy Drew, unravel the knot of scattered clues and scary superstitions?. Nancy Drew: The Haunting of Castle Malloy is half price today, costing you only £2.99, if you have a Steam account.