Haunting Ground cleverly lets the player feel Fionas state of mind as she explores the castle. Not knowing who they are and the plans they have in store for her when Fiona encounters its other inhabitants; she naturally becomes frightened and the control pad mimics the pounding of her heart. Fiona will also become much more difficult to control and will stumble and fall. To add to the experience; Fionas fear is also represented graphically with colour fading from the screen to be replaced by stark monochrome. By running away or hiding; Fionas heart rate and actions will return to normal and colour will be restored.
Fiona is aided in her search for answers by Hewie; an Alsatian dog; which she befriends by releasing from a trap. Just as in real life Hewie does not at first obey all of the commands Fiona gives him; but as his trust for his new mistress grows so does his willingness to do as she bids including fetching objects and even attacking assailants.