Io-Interactive A/S (commonly abbreviated to IOI, on releases covered as and commony referred to as IO Interactive) is a Danish development studio owned by Square Enix Europe, a subsidiary of Square Enix. The company was founded in September 1998 by the Reto-Moto development group. To date, their most popular franchise is the Hitman series. This team is also known for their references (also known as an Easter egg) to their own games, such as Agent 47 advertising designer clothes in Freedom Fighters or featuring Kane & Lynch.