Haunted House is a modern reimagining of Atari's classic adventure. Players control Lyn Graves, the niece of famed treasure hunter Zachary Graves, as she explores her uncle's haunted mansion. Using 3D isometric stealth gameplay, Lyn must navigate procedurally generated rooms, shifting walls, and unpredictable enemy placements. She must rescue her friends and uncle by collecting shattered pieces of a magical urn while battling ghouls, ectoplasms, and boss-guarded urn shards. Each run features new floor layouts, encouraging careful sneaking, dashing, and puzzle solving.