Denis Dyack: Denis Dyack. Director: Eternal Darkness: Sanity's Requiem. Denis Dyack was born on 24 July 1966 in St. Catharines, Ontario, Canada. He is a director and producer, known for Eternal Darkness: Sanity's Requiem (2002), Blood Omen: Legacy of Kain (1996) and Metal Gear Solid: The Twin Snakes (2004). He is married to Joanne Dyack.