One of the gaming industry’s most notable icons, Warren Spector, has decided to retire and will no longer be actively involved in game development. Spector is credited as one of the founders of the immersive sim genre, with Deus Ex and Thief acting as his most recognisable projects while at Ion Storm. Spector went on to develop Epic Mickey and its sequel, eventually landing at Otherside Entertainment to develop a spiritual successor to Ultima Underworld, which he helped produce while…